21311010332 has 12 divisors (see below), whose sum is σ = 37298452800. Its totient is φ = 10654309536.

The previous prime is 21311010323. The next prime is 21311010353. The reversal of 21311010332 is 23301011312.

It is a super-2 number, since 2×21311010332² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21311010332.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258188 + ... + 330579.

It is an arithmetic number, because the mean of its divisors is an integer number (3108204400).

Almost surely, 2^21311010332 is an apocalyptic number.

It is an amenable number.

21311010332 is a deficient number, since it is larger than the sum of its proper divisors (15987442468).

21311010332 is a wasteful number, since it uses less digits than its factorization.

21311010332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597820 (or 597818 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21311010332 its reverse (23301011312), we get a palindrome (44612021644).

The spelling of 21311010332 in words is "twenty-one billion, three hundred eleven million, ten thousand, three hundred thirty-two".