231132211331212 has 24 divisors (see below), whose sum is σ = 406963862840304. Its totient is φ = 114858060875712.

The previous prime is 231132211331179. The next prime is 231132211331261. The reversal of 231132211331212 is 212133112231132.

It is a super-2 number, since 2×231132211331212² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154119123 + ... + 155611594.

It is an arithmetic number, because the mean of its divisors is an integer number (16956827618346).

Almost surely, 2^{231132211331212} is an apocalyptic number.

It is an amenable number.

231132211331212 is a deficient number, since it is larger than the sum of its proper divisors (175831651509092).

231132211331212 is a wasteful number, since it uses less digits than its factorization.

231132211331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309731865 (or 309731863 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

Adding to 231132211331212 its reverse (212133112231132), we get a palindrome (443265323562344).

The spelling of 231132211331212 in words is "two hundred thirty-one trillion, one hundred thirty-two billion, two hundred eleven million, three hundred thirty-one thousand, two hundred twelve".