231212133132 has 24 divisors (see below), whose sum is σ = 541401327936. Its totient is φ = 76798375248.

The previous prime is 231212133109. The next prime is 231212133149. The reversal of 231212133132 is 231331212132.

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

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, 34038438 + ... + 34045229.

It is an arithmetic number, because the mean of its divisors is an integer number (22558388664).

Almost surely, 2^231212133132 is an apocalyptic number.

It is an amenable number.

231212133132 is an abundant number, since it is smaller than the sum of its proper divisors (310189194804).

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

231212133132 is a wasteful number, since it uses less digits than its factorization.

231212133132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68083957 (or 68083955 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

Adding to 231212133132 its reverse (231331212132), we get a palindrome (462543345264).

The spelling of 231212133132 in words is "two hundred thirty-one billion, two hundred twelve million, one hundred thirty-three thousand, one hundred thirty-two".