31021331132 has 24 divisors (see below), whose sum is σ = 60193407792. Its totient is φ = 13869446400.

The previous prime is 31021331123. The next prime is 31021331137. The reversal of 31021331132 is 23113312013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021331137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5776253 + ... + 5781620.

It is an arithmetic number, because the mean of its divisors is an integer number (2508058658).

Almost surely, 2^31021331132 is an apocalyptic number.

It is an amenable number.

31021331132 is a deficient number, since it is larger than the sum of its proper divisors (29172076660).

31021331132 is a wasteful number, since it uses less digits than its factorization.

31021331132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11557949 (or 11557947 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31021331132 its reverse (23113312013), we get a palindrome (54134643145).

The spelling of 31021331132 in words is "thirty-one billion, twenty-one million, three hundred thirty-one thousand, one hundred thirty-two".