222100021210212 has 72 divisors (see below), whose sum is σ = 563478972875000. Its totient is φ = 73762101024768.

The previous prime is 222100021210157. The next prime is 222100021210219. The reversal of 222100021210212 is 212012120001222.

It is a happy number.

222100021210212 is a `hidden beast` number, since 2 + 221 + 0 + 0 + 0 + 21 + 210 + 212 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15321775804416 + 206778245405796 = 3914304^2 + 14379786^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (222100021210219) 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, 8615778 + ... + 22769094.

Almost surely, 2^{222100021210212} is an apocalyptic number.

It is an amenable number.

222100021210212 is an abundant number, since it is smaller than the sum of its proper divisors (341378951664788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222100021210212 is a wasteful number, since it uses less digits than its factorization.

222100021210212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14154925 (or 14154920 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222100021210212 its reverse (212012120001222), we get a palindrome (434112141211434).

The spelling of 222100021210212 in words is "two hundred twenty-two trillion, one hundred billion, twenty-one million, two hundred ten thousand, two hundred twelve".