31121322132 has 48 divisors (see below), whose sum is σ = 72818450432. Its totient is φ = 10344952800.

The previous prime is 31121322101. The next prime is 31121322157. The reversal of 31121322132 is 23122312113.

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

It is a junction number, because it is equal to n+sod(n) for n = 31121322099 and 31121322108.

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, 10914507 + ... + 10917357.

Almost surely, 2^31121322132 is an apocalyptic number.

It is an amenable number.

31121322132 is an abundant number, since it is smaller than the sum of its proper divisors (41697128300).

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

31121322132 is a wasteful number, since it uses less digits than its factorization.

31121322132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068 (or 5066 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 31121322132 its reverse (23122312113), we get a palindrome (54243634245).

The spelling of 31121322132 in words is "thirty-one billion, one hundred twenty-one million, three hundred twenty-two thousand, one hundred thirty-two".