222212321121 has 48 divisors (see below), whose sum is σ = 356194222080. Its totient is φ = 122737174560.

The previous prime is 222212321113. The next prime is 222212321159. The reversal of 222212321121 is 121123212222.

It is not a de Polignac number, because 222212321121 - 2³ = 222212321113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (222212321521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3886080 + ... + 3942846.

It is an arithmetic number, because the mean of its divisors is an integer number (7420712960).

Almost surely, 2^222212321121 is an apocalyptic number.

222212321121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222212321121 is a deficient number, since it is larger than the sum of its proper divisors (133981900959).

222212321121 is a wasteful number, since it uses less digits than its factorization.

222212321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57674 (or 57667 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

Adding to 222212321121 its reverse (121123212222), we get a palindrome (343335533343).

The spelling of 222212321121 in words is "two hundred twenty-two billion, two hundred twelve million, three hundred twenty-one thousand, one hundred twenty-one".