222121012112 has 20 divisors (see below), whose sum is σ = 430371644556. Its totient is φ = 111057361920.

The previous prime is 222121012093. The next prime is 222121012213. The reversal of 222121012112 is 211210121222.

It can be written as a sum of positive squares in 2 ways, for example, as 82532096656 + 139588915456 = 287284^2 + 373616^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450968 + ... + 804744.

Almost surely, 2^222121012112 is an apocalyptic number.

It is an amenable number.

222121012112 is a deficient number, since it is larger than the sum of its proper divisors (208250632444).

222121012112 is a wasteful number, since it uses less digits than its factorization.

222121012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393026 (or 393020 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 222121012112 its reverse (211210121222), we get a palindrome (433331133334).

It can be divided in two parts, 2221210 and 12112, that added together give a palindrome (2233322).

The spelling of 222121012112 in words is "two hundred twenty-two billion, one hundred twenty-one million, twelve thousand, one hundred twelve".