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10112121 = 34127983
BaseRepresentation
bin100110100100…
…110001111001
3201000202020000
4212210301321
510042041441
61000423213
7151644255
oct46446171
921022200
1010112121
115787428
123477b09
132130906
1414b3265
15d4b2b6
hex9a4c79

10112121 has 20 divisors (see below), whose sum is σ = 15240192. Its totient is φ = 6681528.

The previous prime is 10112101. The next prime is 10112129. The reversal of 10112121 is 12121101.

Adding to 10112121 its reverse (12121101), we get a palindrome (22233222).

It can be divided in two parts, 101 and 12121, that multiplied together give a palindrome (1224221).

It is a happy number.

10112121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10112121 - 26 = 10112057 is a prime.

It is a super-2 number, since 2×101121212 = 204509982237282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (10112129) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9796 + ... + 10778.

Almost surely, 210112121 is an apocalyptic number.

It is an amenable number.

10112121 is a deficient number, since it is larger than the sum of its proper divisors (5128071).

10112121 is an equidigital number, since it uses as much as digits as its factorization.

10112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 10112121 is about 3179.9561317729. The cubic root of 10112121 is about 216.2456695537.

The spelling of 10112121 in words is "ten million, one hundred twelve thousand, one hundred twenty-one".

Divisors: 1 3 9 27 81 127 381 983 1143 2949 3429 8847 10287 26541 79623 124841 374523 1123569 3370707 10112121