21122102122200 has 96 divisors (see below), whose sum is σ = 72753907328400. Its totient is φ = 5632560564480.

The previous prime is 21122102122127. The next prime is 21122102122243. The reversal of 21122102122200 is 222120122112.

It is a happy number.

21122102122200 is a `hidden beast` number, since 2 + 11 + 221 + 0 + 212 + 220 + 0 = 666.

It is a super-2 number, since 2×21122102122200² (a number of 27 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 1955744797 + ... + 1955755596.

Almost surely, 2^{21122102122200} is an apocalyptic number.

21122102122200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122102122200 is an abundant number, since it is smaller than the sum of its proper divisors (51631805206200).

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

21122102122200 is a wasteful number, since it uses less digits than its factorization.

21122102122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911500418 (or 3911500403 counting only the distinct ones).

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

Adding to 21122102122200 its reverse (222120122112), we get a palindrome (21344222244312).

The spelling of 21122102122200 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred two million, one hundred twenty-two thousand, two hundred".