22121012304 has 40 divisors (see below), whose sum is σ = 63495499520. Its totient is φ = 7373670624.

The previous prime is 22121012293. The next prime is 22121012317. The reversal of 22121012304 is 40321012122.

It is a happy number.

22121012304 is a `hidden beast` number, since 221 + 210 + 1 + 230 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25602592 + ... + 25603455.

It is an arithmetic number, because the mean of its divisors is an integer number (1587387488).

Almost surely, 2^22121012304 is an apocalyptic number.

22121012304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22121012304 is an abundant number, since it is smaller than the sum of its proper divisors (41374487216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121012304 is a wasteful number, since it uses less digits than its factorization.

22121012304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51206064 (or 51206052 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22121012304 its reverse (40321012122), we get a palindrome (62442024426).

The spelling of 22121012304 in words is "twenty-two billion, one hundred twenty-one million, twelve thousand, three hundred four".