22420421321 has 48 divisors (see below), whose sum is σ = 26096361984. Its totient is φ = 19169644032.

The previous prime is 22420421281. The next prime is 22420421341. The reversal of 22420421321 is 12312402422.

It is a de Polignac number, because none of the positive numbers 2^k-22420421321 is a prime.

It is a super-2 number, since 2×22420421321² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22420421341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14307080 + ... + 14308646.

It is an arithmetic number, because the mean of its divisors is an integer number (543674208).

Almost surely, 2^22420421321 is an apocalyptic number.

It is an amenable number.

22420421321 is a deficient number, since it is larger than the sum of its proper divisors (3675940663).

22420421321 is a wasteful number, since it uses less digits than its factorization.

22420421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710 (or 1687 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 22420421321 its reverse (12312402422), we get a palindrome (34732823743).

The spelling of 22420421321 in words is "twenty-two billion, four hundred twenty million, four hundred twenty-one thousand, three hundred twenty-one".