22200012100021 has 8 divisors (see below), whose sum is σ = 25889226939200. Its totient is φ = 19028581799724.

The previous prime is 22200012100003. The next prime is 22200012100111. The reversal of 22200012100021 is 12000121000222.

It is a happy number.

It is not a de Polignac number, because 22200012100021 - 2²⁷ = 22199877882293 is a prime.

It is a super-3 number, since 3×22200012100021³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22200012099974 and 22200012100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200012100621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32361533331 + ... + 32361534016.

It is an arithmetic number, because the mean of its divisors is an integer number (3236153367400).

Almost surely, 2^{22200012100021} is an apocalyptic number.

It is an amenable number.

22200012100021 is a deficient number, since it is larger than the sum of its proper divisors (3689214839179).

22200012100021 is an frugal number, since it uses more digits than its factorization.

22200012100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64723067368 (or 64723067354 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22200012100021 its reverse (12000121000222), we get a palindrome (34200133100243).

The spelling of 22200012100021 in words is "twenty-two trillion, two hundred billion, twelve million, one hundred thousand, twenty-one".