111426706521 has 12 divisors (see below), whose sum is σ = 173330432548. Its totient is φ = 68570280864.

The previous prime is 111426706511. The next prime is 111426706529. The reversal of 111426706521 is 125607624111.

111426706521 is a `hidden beast` number, since 111 + 426 + 70 + 6 + 52 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8433850896 + 102992855625 = 91836^2 + 320925^2 .

It is not a de Polignac number, because 111426706521 - 2²¹ = 111424609369 is a prime.

It is a super-2 number, since 2×111426706521² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111426706529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 476182390 + ... + 476182623.

Almost surely, 2^111426706521 is an apocalyptic number.

It is an amenable number.

111426706521 is a deficient number, since it is larger than the sum of its proper divisors (61903726027).

111426706521 is a wasteful number, since it uses less digits than its factorization.

111426706521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952365032 (or 952365029 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 111426706521 in words is "one hundred eleven billion, four hundred twenty-six million, seven hundred six thousand, five hundred twenty-one".