22222012212 has 36 divisors (see below), whose sum is σ = 58614585120. Its totient is φ = 7085278992.

The previous prime is 22222012201. The next prime is 22222012243. The reversal of 22222012212 is 21221022222.

22222012212 is a `hidden beast` number, since 222 + 220 + 1 + 221 + 2 = 666.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13418262 + ... + 13419917.

It is an arithmetic number, because the mean of its divisors is an integer number (1628182920).

Almost surely, 2^22222012212 is an apocalyptic number.

It is an amenable number.

22222012212 is an abundant number, since it is smaller than the sum of its proper divisors (36392572908).

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

22222012212 is a wasteful number, since it uses less digits than its factorization.

22222012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26838212 (or 26838207 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22222012212 its reverse (21221022222), we get a palindrome (43443034434).

It can be divided in two parts, 222220 and 12212, that added together give a palindrome (234432).

The spelling of 22222012212 in words is "twenty-two billion, two hundred twenty-two million, twelve thousand, two hundred twelve".