22113201231 has 32 divisors (see below), whose sum is σ = 37840780800. Its totient is φ = 12613587840.

The previous prime is 22113201179. The next prime is 22113201233. The reversal of 22113201231 is 13210231122.

22113201231 is a `hidden beast` number, since 221 + 1 + 320 + 123 + 1 = 666.

It is not a de Polignac number, because 22113201231 - 2²³ = 22104812623 is a prime.

It is a super-2 number, since 2×22113201231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22113201233) 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, 2184811 + ... + 2194908.

It is an arithmetic number, because the mean of its divisors is an integer number (1182524400).

Almost surely, 2^22113201231 is an apocalyptic number.

22113201231 is a deficient number, since it is larger than the sum of its proper divisors (15727579569).

22113201231 is a wasteful number, since it uses less digits than its factorization.

22113201231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4379756 (or 4379750 counting only the distinct ones).

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

Adding to 22113201231 its reverse (13210231122), we get a palindrome (35323432353).

The spelling of 22113201231 in words is "twenty-two billion, one hundred thirteen million, two hundred one thousand, two hundred thirty-one".