31302121332 has 48 divisors (see below), whose sum is σ = 73532777472. Its totient is φ = 10363566720.

The previous prime is 31302121309. The next prime is 31302121363. The reversal of 31302121332 is 23312120313.

It is a junction number, because it is equal to n+sod(n) for n = 31302121299 and 31302121308.

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, 1541598 + ... + 1561770.

It is an arithmetic number, because the mean of its divisors is an integer number (1531932864).

Almost surely, 2^31302121332 is an apocalyptic number.

It is an amenable number.

31302121332 is an abundant number, since it is smaller than the sum of its proper divisors (42230656140).

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

31302121332 is a wasteful number, since it uses less digits than its factorization.

31302121332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21048 (or 21046 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31302121332 its reverse (23312120313), we get a palindrome (54614241645).

The spelling of 31302121332 in words is "thirty-one billion, three hundred two million, one hundred twenty-one thousand, three hundred thirty-two".