22123201212 has 72 divisors (see below), whose sum is σ = 65973153792. Its totient is φ = 6117012000.

The previous prime is 22123201207. The next prime is 22123201229. The reversal of 22123201212 is 21210232122.

22123201212 is a `hidden beast` number, since 221 + 2 + 320 + 121 + 2 = 666.

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 23 ways as a sum of consecutive naturals, for example, 1408164 + ... + 1423787.

Almost surely, 2^22123201212 is an apocalyptic number.

It is an amenable number.

22123201212 is an abundant number, since it is smaller than the sum of its proper divisors (43849952580).

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

22123201212 is a wasteful number, since it uses less digits than its factorization.

22123201212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831999 (or 2831994 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22123201212 its reverse (21210232122), we get a palindrome (43333433334).

The spelling of 22123201212 in words is "twenty-two billion, one hundred twenty-three million, two hundred one thousand, two hundred twelve".