222221110212 has 72 divisors (see below), whose sum is σ = 567432978840. Its totient is φ = 73321459200.

The previous prime is 222221110211. The next prime is 222221110219. The reversal of 222221110212 is 212011122222.

It is a happy number.

222221110212 is a `hidden beast` number, since 222 + 221 + 1 + 10 + 212 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 84109280256 + 138111829956 = 290016^2 + 371634^2 .

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 (222221110211) 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, 25916758 + ... + 25925330.

It is an arithmetic number, because the mean of its divisors is an integer number (7881013595).

Almost surely, 2^222221110212 is an apocalyptic number.

It is an amenable number.

222221110212 is an abundant number, since it is smaller than the sum of its proper divisors (345211868628).

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

222221110212 is a wasteful number, since it uses less digits than its factorization.

222221110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15813 (or 15808 counting only the distinct ones).

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

Adding to 222221110212 its reverse (212011122222), we get a palindrome (434232232434).

The spelling of 222221110212 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred ten thousand, two hundred twelve".