31131220210132 has 48 divisors (see below), whose sum is σ = 64970254685952. Its totient is φ = 12761719027200.

The previous prime is 31131220210073. The next prime is 31131220210151. The reversal of 31131220210132 is 23101202213113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68587132 + ... + 69039532.

It is an arithmetic number, because the mean of its divisors is an integer number (1353546972624).

Almost surely, 2^{31131220210132} is an apocalyptic number.

It is an amenable number.

31131220210132 is an abundant number, since it is smaller than the sum of its proper divisors (33839034475820).

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

31131220210132 is a wasteful number, since it uses less digits than its factorization.

31131220210132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559288 (or 559286 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31131220210132 its reverse (23101202213113), we get a palindrome (54232422423245).

The spelling of 31131220210132 in words is "thirty-one trillion, one hundred thirty-one billion, two hundred twenty million, two hundred ten thousand, one hundred thirty-two".