222222212001 has 24 divisors (see below), whose sum is σ = 323106796584. Its totient is φ = 147172354560.

The previous prime is 222222211999. The next prime is 222222212033. The reversal of 222222212001 is 100212222222.

222222212001 is a `hidden beast` number, since 22 + 222 + 221 + 200 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 88503275025 + 133718936976 = 297495^2 + 365676^2 .

It is not a de Polignac number, because 222222212001 - 2¹ = 222222211999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222222292001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1077145 + ... + 1266761.

It is an arithmetic number, because the mean of its divisors is an integer number (13462783191).

Almost surely, 2^222222212001 is an apocalyptic number.

It is an amenable number.

222222212001 is a deficient number, since it is larger than the sum of its proper divisors (100884584583).

222222212001 is a wasteful number, since it uses less digits than its factorization.

222222212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190481 (or 190478 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 222222212001 its reverse (100212222222), we get a palindrome (322434434223).

The spelling of 222222212001 in words is "two hundred twenty-two billion, two hundred twenty-two million, two hundred twelve thousand, one".