22123230012 has 36 divisors (see below), whose sum is σ = 60224349640. Its totient is φ = 6807147552.

The previous prime is 22123229993. The next prime is 22123230049. The reversal of 22123230012 is 21003232122.

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, 23635462 + ... + 23636397.

Almost surely, 2^22123230012 is an apocalyptic number.

It is an amenable number.

22123230012 is an abundant number, since it is smaller than the sum of its proper divisors (38101119628).

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

22123230012 is a wasteful number, since it uses less digits than its factorization.

22123230012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47271882 (or 47271877 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22123230012 its reverse (21003232122), we get a palindrome (43126462134).

The spelling of 22123230012 in words is "twenty-two billion, one hundred twenty-three million, two hundred thirty thousand, twelve".