22121022000 has 320 divisors, whose sum is σ = 88918023168. Its totient is φ = 4596480000.

The previous prime is 22121021999. The next prime is 22121022019. The reversal of 22121022000 is 22012122.

It is a super-2 number, since 2×22121022000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 438060 + ... + 485940.

Almost surely, 2^22121022000 is an apocalyptic number.

22121022000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121022000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44459011584).

22121022000 is an abundant number, since it is smaller than the sum of its proper divisors (66797001168).

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

22121022000 is a wasteful number, since it uses less digits than its factorization.

22121022000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47925 (or 47909 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22121022000 its reverse (22012122), we get a palindrome (22143034122).

The spelling of 22121022000 in words is "twenty-two billion, one hundred twenty-one million, twenty-two thousand".