22001121012 has 36 divisors (see below), whose sum is σ = 55588636320. Its totient is φ = 6769575072.

The previous prime is 22001120993. The next prime is 22001121049. The reversal of 22001121012 is 21012110022.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 5422312 + ... + 5426367.

Almost surely, 2^22001121012 is an apocalyptic number.

It is an amenable number.

22001121012 is an abundant number, since it is smaller than the sum of its proper divisors (33587515308).

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

22001121012 is a wasteful number, since it uses less digits than its factorization.

22001121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10848712 (or 10848697 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22001121012 its reverse (21012110022), we get a palindrome (43013231034).

The spelling of 22001121012 in words is "twenty-two billion, one million, one hundred twenty-one thousand, twelve".