22131201213 has 32 divisors (see below), whose sum is σ = 35869092480. Its totient is φ = 13374789120.

The previous prime is 22131201203. The next prime is 22131201217. The reversal of 22131201213 is 31210213122.

22131201213 is a `hidden beast` number, since 221 + 31 + 201 + 213 = 666.

It is not a de Polignac number, because 22131201213 - 2⁵ = 22131201181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131201217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 706 + ... + 210387.

It is an arithmetic number, because the mean of its divisors is an integer number (1120909140).

Almost surely, 2^22131201213 is an apocalyptic number.

It is an amenable number.

22131201213 is a deficient number, since it is larger than the sum of its proper divisors (13737891267).

22131201213 is a wasteful number, since it uses less digits than its factorization.

22131201213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211466 (or 211460 counting only the distinct ones).

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

Adding to 22131201213 its reverse (31210213122), we get a palindrome (53341414335).

The spelling of 22131201213 in words is "twenty-two billion, one hundred thirty-one million, two hundred one thousand, two hundred thirteen".