22402242020421 has 80 divisors (see below), whose sum is σ = 36151606808064. Its totient is φ = 13790009223936.

The previous prime is 22402242020383. The next prime is 22402242020503. The reversal of 22402242020421 is 12402024220422.

It is not a de Polignac number, because 22402242020421 - 2⁶ = 22402242020357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22402242020021) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4639575 + ... + 8144331.

Almost surely, 2^{22402242020421} is an apocalyptic number.

It is an amenable number.

22402242020421 is a deficient number, since it is larger than the sum of its proper divisors (13749364787643).

22402242020421 is a wasteful number, since it uses less digits than its factorization.

22402242020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3504912 (or 3504903 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 22402242020421 its reverse (12402024220422), we get a palindrome (34804266240843).

The spelling of 22402242020421 in words is "twenty-two trillion, four hundred two billion, two hundred forty-two million, twenty thousand, four hundred twenty-one".