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1211100120230 = 2571113120989023
BaseRepresentation
bin10001100111111011001…
…100010100010010100110
311021210001122112122100112
4101213323030110102212
5124320313112321410
62324212142413022
7153333122111420
oct21477314242246
94253048478315
101211100120230
11427696498780
12176876b91172
138a28b1987a0
144289081b810
1521784455105
hex119fb3144a6

1211100120230 has 64 divisors (see below), whose sum is σ = 2926966468608. Its totient is φ = 348448383360.

The previous prime is 1211100120221. The next prime is 1211100120233. The reversal of 1211100120230 is 320210011121.

Adding to 1211100120230 its reverse (320210011121), we get a palindrome (1531310131351).

It is a super-2 number, since 2×12111001202302 (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211100120233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60484502 + ... + 60504521.

It is an arithmetic number, because the mean of its divisors is an integer number (45733851072).

Almost surely, 21211100120230 is an apocalyptic number.

1211100120230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211100120230 is an abundant number, since it is smaller than the sum of its proper divisors (1715866348378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211100120230 is a wasteful number, since it uses less digits than its factorization.

1211100120230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120989061.

The product of its (nonzero) digits is 24, while the sum is 14.

The spelling of 1211100120230 in words is "one trillion, two hundred eleven billion, one hundred million, one hundred twenty thousand, two hundred thirty".

Divisors: 1 2 5 7 10 11 13 14 22 26 35 55 65 70 77 91 110 130 143 154 182 286 385 455 715 770 910 1001 1430 2002 5005 10010 120989023 241978046 604945115 846923161 1209890230 1330879253 1572857299 1693846322 2661758506 3145714598 4234615805 6654396265 7864286495 8469231610 9316154771 11010001093 13308792530 15728572990 17301430289 18632309542 22020002186 34602860578 46580773855 55050005465 86507151445 93161547710 110100010930 121110012023 173014302890 242220024046 605550060115 1211100120230