222212111121 has 96 divisors (see below), whose sum is σ = 442604967168. Its totient is φ = 103675230720.

The previous prime is 222212111063. The next prime is 222212111123. The reversal of 222212111121 is 121111212222.

222212111121 is a `hidden beast` number, since 222 + 212 + 111 + 121 = 666.

It is not a de Polignac number, because 222212111121 - 2⁶ = 222212111057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222212111094 and 222212111103.

It is not an unprimeable number, because it can be changed into a prime (222212111123) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15 + ... + 666651.

It is an arithmetic number, because the mean of its divisors is an integer number (4610468408).

Almost surely, 2^222212111121 is an apocalyptic number.

222212111121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222212111121 is a deficient number, since it is larger than the sum of its proper divisors (220392856047).

222212111121 is a wasteful number, since it uses less digits than its factorization.

222212111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666711 (or 666708 counting only the distinct ones).

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

Adding to 222212111121 its reverse (121111212222), we get a palindrome (343323323343).

It can be divided in two parts, 222212 and 111121, that added together give a palindrome (333333).

The spelling of 222212111121 in words is "two hundred twenty-two billion, two hundred twelve million, one hundred eleven thousand, one hundred twenty-one".