22013113212 has 18 divisors (see below), whose sum is σ = 55644258488. Its totient is φ = 7337704392.

The previous prime is 22013113181. The next prime is 22013113231. The reversal of 22013113212 is 21231131022.

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 305737648 + ... + 305737719.

Almost surely, 2^22013113212 is an apocalyptic number.

It is an amenable number.

22013113212 is an abundant number, since it is smaller than the sum of its proper divisors (33631145276).

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

22013113212 is a wasteful number, since it uses less digits than its factorization.

22013113212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611475377 (or 611475372 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 22013113212 its reverse (21231131022), we get a palindrome (43244244234).

The spelling of 22013113212 in words is "twenty-two billion, thirteen million, one hundred thirteen thousand, two hundred twelve".