22401320421 has 8 divisors (see below), whose sum is σ = 30358073824. Its totient is φ = 14689390320.

The previous prime is 22401320411. The next prime is 22401320467. The reversal of 22401320421 is 12402310422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22401320421 - 2⁹ = 22401319909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22401320411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61205611 + ... + 61205976.

It is an arithmetic number, because the mean of its divisors is an integer number (3794759228).

Almost surely, 2^22401320421 is an apocalyptic number.

It is an amenable number.

22401320421 is a deficient number, since it is larger than the sum of its proper divisors (7956753403).

22401320421 is a wasteful number, since it uses less digits than its factorization.

22401320421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122411651.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 22401320421 its reverse (12402310422), we get a palindrome (34803630843).

Subtracting from 22401320421 its reverse (12402310422), we obtain a palindrome (9999009999).

The spelling of 22401320421 in words is "twenty-two billion, four hundred one million, three hundred twenty thousand, four hundred twenty-one".