222100211210121 has 8 divisors (see below), whose sum is σ = 329037349940960. Its totient is φ = 148066807473396.

The previous prime is 222100211210099. The next prime is 222100211210147. The reversal of 222100211210121 is 121012112001222.

222100211210121 is a `hidden beast` number, since 2 + 22 + 100 + 211 + 210 + 121 = 666.

It is not a de Polignac number, because 222100211210121 - 2¹⁷ = 222100211079049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222100211210094 and 222100211210103.

It is not an unprimeable number, because it can be changed into a prime (222100211210191) 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, 4112966874235 + ... + 4112966874288.

It is an arithmetic number, because the mean of its divisors is an integer number (41129668742620).

Almost surely, 2^{222100211210121} is an apocalyptic number.

It is an amenable number.

222100211210121 is a deficient number, since it is larger than the sum of its proper divisors (106937138730839).

222100211210121 is an equidigital number, since it uses as much as digits as its factorization.

222100211210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8225933748532 (or 8225933748526 counting only the distinct ones).

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

Adding to 222100211210121 its reverse (121012112001222), we get a palindrome (343112323211343).

The spelling of 222100211210121 in words is "two hundred twenty-two trillion, one hundred billion, two hundred eleven million, two hundred ten thousand, one hundred twenty-one".