22121012122200 has 144 divisors (see below), whose sum is σ = 76686175550400. Its totient is φ = 5708648275200.

The previous prime is 22121012122177. The next prime is 22121012122337. The reversal of 22121012122200 is 222121012122.

It is a happy number.

22121012122200 is a `hidden beast` number, since 2 + 21 + 210 + 1 + 212 + 220 + 0 = 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 35 ways as a sum of consecutive naturals, for example, 198161155 + ... + 198272754.

Almost surely, 2^{22121012122200} is an apocalyptic number.

22121012122200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121012122200 is an abundant number, since it is smaller than the sum of its proper divisors (54565163428200).

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

22121012122200 is a wasteful number, since it uses less digits than its factorization.

22121012122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396433962 (or 396433950 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22121012122200 its reverse (222121012122), we get a palindrome (22343133134322).

The spelling of 22121012122200 in words is "twenty-two trillion, one hundred twenty-one billion, twelve million, one hundred twenty-two thousand, two hundred".