22100211212121 has 72 divisors (see below), whose sum is σ = 38093241356352. Its totient is φ = 12085938979200.

The previous prime is 22100211212099. The next prime is 22100211212147. The reversal of 22100211212121 is 12121211200122.

22100211212121 is a `hidden beast` number, since 22 + 100 + 211 + 212 + 121 = 666.

It is not a de Polignac number, because 22100211212121 - 2²⁷ = 22100076994393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22100211212094 and 22100211212103.

It is not an unprimeable number, because it can be changed into a prime (22100211213121) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7399666 + ... + 9947636.

It is an arithmetic number, because the mean of its divisors is an integer number (529072796616).

Almost surely, 2^{22100211212121} is an apocalyptic number.

22100211212121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22100211212121 is a deficient number, since it is larger than the sum of its proper divisors (15993030144231).

22100211212121 is a wasteful number, since it uses less digits than its factorization.

22100211212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548143 (or 2548079 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22100211212121 its reverse (12121211200122), we get a palindrome (34221422412243).

The spelling of 22100211212121 in words is "twenty-two trillion, one hundred billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty-one".