131231112222 has 32 divisors (see below), whose sum is σ = 302708736000. Its totient is φ = 37150615008.

The previous prime is 131231112197. The next prime is 131231112223. The reversal of 131231112222 is 222211132131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131231112223) 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, 14328222 + ... + 14337377.

It is an arithmetic number, because the mean of its divisors is an integer number (9459648000).

Almost surely, 2^131231112222 is an apocalyptic number.

131231112222 is an abundant number, since it is smaller than the sum of its proper divisors (171477623778).

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

131231112222 is a wasteful number, since it uses less digits than its factorization.

131231112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28665720.

The product of its digits is 288, while the sum is 21.

Adding to 131231112222 its reverse (222211132131), we get a palindrome (353442244353).

The spelling of 131231112222 in words is "one hundred thirty-one billion, two hundred thirty-one million, one hundred twelve thousand, two hundred twenty-two".