21031222220332 has 12 divisors (see below), whose sum is σ = 36807231408640. Its totient is φ = 10514870389296.

The previous prime is 21031222220329. The next prime is 21031222220389. The reversal of 21031222220332 is 23302222213012.

It is a junction number, because it is equal to n+sod(n) for n = 21031222220297 and 21031222220306.

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, 185116332 + ... + 185229907.

Almost surely, 2^{21031222220332} is an apocalyptic number.

It is an amenable number.

21031222220332 is a deficient number, since it is larger than the sum of its proper divisors (15776009188308).

21031222220332 is a wasteful number, since it uses less digits than its factorization.

21031222220332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370360440 (or 370360438 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21031222220332 its reverse (23302222213012), we get a palindrome (44333444433344).

The spelling of 21031222220332 in words is "twenty-one trillion, thirty-one billion, two hundred twenty-two million, two hundred twenty thousand, three hundred thirty-two".