21321201322 has 16 divisors (see below), whose sum is σ = 32339922912. Its totient is φ = 10541802960.

The previous prime is 21321201311. The next prime is 21321201353. The reversal of 21321201322 is 22310212312.

It is a self number, because there is not a number n which added to its sum of digits gives 21321201322.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69633 + ... + 217924.

It is an arithmetic number, because the mean of its divisors is an integer number (2021245182).

Almost surely, 2^21321201322 is an apocalyptic number.

21321201322 is a deficient number, since it is larger than the sum of its proper divisors (11018721590).

21321201322 is a wasteful number, since it uses less digits than its factorization.

21321201322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287973.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21321201322 its reverse (22310212312), we get a palindrome (43631413634).

The spelling of 21321201322 in words is "twenty-one billion, three hundred twenty-one million, two hundred one thousand, three hundred twenty-two".