21031130332 has 6 divisors (see below), whose sum is σ = 36804478088. Its totient is φ = 10515565164.

The previous prime is 21031130327. The next prime is 21031130347. The reversal of 21031130332 is 23303113012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2628891288 + ... + 2628891295.

Almost surely, 2^21031130332 is an apocalyptic number.

It is an amenable number.

21031130332 is a deficient number, since it is larger than the sum of its proper divisors (15773347756).

21031130332 is a wasteful number, since it uses less digits than its factorization.

21031130332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5257782587 (or 5257782585 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21031130332 its reverse (23303113012), we get a palindrome (44334243344).

The spelling of 21031130332 in words is "twenty-one billion, thirty-one million, one hundred thirty thousand, three hundred thirty-two".