22121000344 has 16 divisors (see below), whose sum is σ = 43659869400. Its totient is φ = 10478368512.

The previous prime is 22121000299. The next prime is 22121000359. The reversal of 22121000344 is 44300012122.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72766297 + ... + 72766600.

Almost surely, 2^22121000344 is an apocalyptic number.

It is an amenable number.

22121000344 is a deficient number, since it is larger than the sum of its proper divisors (21538869056).

22121000344 is a wasteful number, since it uses less digits than its factorization.

22121000344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145532922 (or 145532918 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22121000344 its reverse (44300012122), we get a palindrome (66421012466).

The spelling of 22121000344 in words is "twenty-two billion, one hundred twenty-one million, three hundred forty-four", and thus it is an aban number.