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11111212212102 = 2331071923020459
BaseRepresentation
bin1010000110110000011111…
…0110110101111110000110
31110100012222111001102002000
42201230013312311332012
52424021230311241402
635344230451130130
72224521124324002
oct241540766657606
943305874042060
1011111212212102
1135a4269696a02
1212b55165a3946
13627a23accb12
142a5add747702
15144064e00c1c
hexa1b07db5f86

11111212212102 has 32 divisors (see below), whose sum is σ = 24922345161600. Its totient is φ = 3669123033864.

The previous prime is 11111212212101. The next prime is 11111212212119. The reversal of 11111212212102 is 20121221211111.

It is a happy number.

11111212212102 is a `hidden beast` number, since 1 + 111 + 121 + 221 + 210 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111212212101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 961504452 + ... + 961516007.

It is an arithmetic number, because the mean of its divisors is an integer number (778823286300).

Almost surely, 211111212212102 is an apocalyptic number.

11111212212102 is an abundant number, since it is smaller than the sum of its proper divisors (13811132949498).

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

11111212212102 is a wasteful number, since it uses less digits than its factorization.

11111212212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923020577 (or 1923020571 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11111212212102 its reverse (20121221211111), we get a palindrome (31232433423213).

The spelling of 11111212212102 in words is "eleven trillion, one hundred eleven billion, two hundred twelve million, two hundred twelve thousand, one hundred two".

Divisors: 1 2 3 6 9 18 27 54 107 214 321 642 963 1926 2889 5778 1923020459 3846040918 5769061377 11538122754 17307184131 34614368262 51921552393 103843104786 205763189113 411526378226 617289567339 1234579134678 1851868702017 3703737404034 5555606106051 11111212212102