22144400421 has 32 divisors (see below), whose sum is σ = 36513415680. Its totient is φ = 11736446400.

The previous prime is 22144400417. The next prime is 22144400429. The reversal of 22144400421 is 12400444122.

It is not a de Polignac number, because 22144400421 - 2² = 22144400417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22144400391 and 22144400400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22144400429) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1350235 + ... + 1366536.

It is an arithmetic number, because the mean of its divisors is an integer number (1141044240).

Almost surely, 2^22144400421 is an apocalyptic number.

It is an amenable number.

22144400421 is a deficient number, since it is larger than the sum of its proper divisors (14369015259).

22144400421 is a wasteful number, since it uses less digits than its factorization.

22144400421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2716817.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 22144400421 its reverse (12400444122), we get a palindrome (34544844543).

The spelling of 22144400421 in words is "twenty-two billion, one hundred forty-four million, four hundred thousand, four hundred twenty-one".