21013220322 has 48 divisors (see below), whose sum is σ = 45993796992. Its totient is φ = 6933120480.

The previous prime is 21013220303. The next prime is 21013220339. The reversal of 21013220322 is 22302231012.

21013220322 is a `hidden beast` number, since 21 + 0 + 1 + 322 + 0 + 322 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21013220295 and 21013220304.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 924903 + ... + 947349.

It is an arithmetic number, because the mean of its divisors is an integer number (958204104).

Almost surely, 2^21013220322 is an apocalyptic number.

21013220322 is an abundant number, since it is smaller than the sum of its proper divisors (24980576670).

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

21013220322 is a wasteful number, since it uses less digits than its factorization.

21013220322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22983 (or 22980 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21013220322 its reverse (22302231012), we get a palindrome (43315451334).

The spelling of 21013220322 in words is "twenty-one billion, thirteen million, two hundred twenty thousand, three hundred twenty-two".