111011313231 has 48 divisors (see below), whose sum is σ = 202687377984. Its totient is φ = 56972823552.

The previous prime is 111011313209. The next prime is 111011313253. The reversal of 111011313231 is 132313110111.

111011313231 is a `hidden beast` number, since 1 + 110 + 11 + 313 + 231 = 666.

It is an interprime number because it is at equal distance from previous prime (111011313209) and next prime (111011313253).

It is not a de Polignac number, because 111011313231 - 2¹¹ = 111011311183 is a prime.

It is a super-2 number, since 2×111011313231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011313431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1801386 + ... + 1861991.

It is an arithmetic number, because the mean of its divisors is an integer number (4222653708).

Almost surely, 2^111011313231 is an apocalyptic number.

111011313231 is a deficient number, since it is larger than the sum of its proper divisors (91676064753).

111011313231 is a wasteful number, since it uses less digits than its factorization.

111011313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663440 (or 3663437 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 111011313231 its reverse (132313110111), we get a palindrome (243324423342).

The spelling of 111011313231 in words is "one hundred eleven billion, eleven million, three hundred thirteen thousand, two hundred thirty-one".