22121022431000 has 64 divisors (see below), whose sum is σ = 51946101960480. Its totient is φ = 8817142396800.

The previous prime is 22121022430973. The next prime is 22121022431009. The reversal of 22121022431000 is 13422012122.

It is a super-2 number, since 2×22121022431000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121022431009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38800079 + ... + 39366078.

Almost surely, 2^{22121022431000} is an apocalyptic number.

22121022431000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121022431000 is an abundant number, since it is smaller than the sum of its proper divisors (29825079529480).

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

22121022431000 is a wasteful number, since it uses less digits than its factorization.

22121022431000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78166461 (or 78166447 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22121022431000 its reverse (13422012122), we get a palindrome (22134444443122).

The spelling of 22121022431000 in words is "twenty-two trillion, one hundred twenty-one billion, twenty-two million, four hundred thirty-one thousand".