222122112012 has 36 divisors (see below), whose sum is σ = 564720876720. Its totient is φ = 73612720992.

The previous prime is 222122111899. The next prime is 222122112019. The reversal of 222122112012 is 210211221222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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 (222122112019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17826312 + ... + 17838767.

It is an arithmetic number, because the mean of its divisors is an integer number (15686691020).

Almost surely, 2^222122112012 is an apocalyptic number.

It is an amenable number.

222122112012 is an abundant number, since it is smaller than the sum of its proper divisors (342598764708).

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

222122112012 is a wasteful number, since it uses less digits than its factorization.

222122112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35665262 (or 35665257 counting only the distinct ones).

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

Adding to 222122112012 its reverse (210211221222), we get a palindrome (432333333234).

The spelling of 222122112012 in words is "two hundred twenty-two billion, one hundred twenty-two million, one hundred twelve thousand, twelve".