21031021320332 has 48 divisors (see below), whose sum is σ = 39529306575360. Its totient is φ = 9754792454400.

The previous prime is 21031021320317. The next prime is 21031021320343. The reversal of 21031021320332 is 23302312013012.

It is a junction number, because it is equal to n+sod(n) for n = 21031021320298 and 21031021320307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16470857 + ... + 17701727.

It is an arithmetic number, because the mean of its divisors is an integer number (823527220320).

Almost surely, 2^{21031021320332} is an apocalyptic number.

It is an amenable number.

21031021320332 is a deficient number, since it is larger than the sum of its proper divisors (18498285255028).

21031021320332 is a wasteful number, since it uses less digits than its factorization.

21031021320332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234502 (or 1234500 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21031021320332 its reverse (23302312013012), we get a palindrome (44333333333344).

The spelling of 21031021320332 in words is "twenty-one trillion, thirty-one billion, twenty-one million, three hundred twenty thousand, three hundred thirty-two".