111231232013131 has 16 divisors (see below), whose sum is σ = 111454076545920. Its totient is φ = 111008633198400.

The previous prime is 111231232013051. The next prime is 111231232013137. The reversal of 111231232013131 is 131310232132111.

It is a cyclic number.

It is not a de Polignac number, because 111231232013131 - 2²³ = 111231223624523 is a prime.

It is a super-2 number, since 2×111231232013131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111231232013096 and 111231232013105.

It is not an unprimeable number, because it can be changed into a prime (111231232013137) 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, 10168312660 + ... + 10168323598.

It is an arithmetic number, because the mean of its divisors is an integer number (6965879784120).

Almost surely, 2^{111231232013131} is an apocalyptic number.

111231232013131 is a deficient number, since it is larger than the sum of its proper divisors (222844532789).

111231232013131 is a wasteful number, since it uses less digits than its factorization.

111231232013131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20394.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 111231232013131 its reverse (131310232132111), we get a palindrome (242541464145242).

The spelling of 111231232013131 in words is "one hundred eleven trillion, two hundred thirty-one billion, two hundred thirty-two million, thirteen thousand, one hundred thirty-one".