131023111122 has 24 divisors (see below), whose sum is σ = 283937572620. Its totient is φ = 43666037280.

The previous prime is 131023111081. The next prime is 131023111129. The reversal of 131023111122 is 221111320131.

131023111122 is a `hidden beast` number, since 1 + 310 + 231 + 1 + 1 + 122 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 130320278001 + 702833121 = 360999^2 + 26511^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 131023111095 and 131023111104.

It is not an unprimeable number, because it can be changed into a prime (131023111129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 597097 + ... + 786492.

Almost surely, 2^131023111122 is an apocalyptic number.

131023111122 is an abundant number, since it is smaller than the sum of its proper divisors (152914461498).

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

131023111122 is a wasteful number, since it uses less digits than its factorization.

131023111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388858 (or 1388855 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 131023111122 its reverse (221111320131), we get a palindrome (352134431253).

The spelling of 131023111122 in words is "one hundred thirty-one billion, twenty-three million, one hundred eleven thousand, one hundred twenty-two".