222121111110 has 32 divisors (see below), whose sum is σ = 533998870272. Its totient is φ = 59131384800.

The previous prime is 222121111109. The next prime is 222121111153. The reversal of 222121111110 is 11111121222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222121111110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6289066 + ... + 6324285.

It is an arithmetic number, because the mean of its divisors is an integer number (16687464696).

Almost surely, 2^222121111110 is an apocalyptic number.

222121111110 is an abundant number, since it is smaller than the sum of its proper divisors (311877759162).

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

222121111110 is a wasteful number, since it uses less digits than its factorization.

222121111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12613948.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 222121111110 its reverse (11111121222), we get a palindrome (233232232332).

The spelling of 222121111110 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred eleven thousand, one hundred ten".