22001133231 has 72 divisors (see below), whose sum is σ = 40699573200. Its totient is φ = 11324033280.

The previous prime is 22001133227. The next prime is 22001133281. The reversal of 22001133231 is 13233110022.

It is not a de Polignac number, because 22001133231 - 2² = 22001133227 is a prime.

It is a super-2 number, since 2×22001133231² (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 (22001133281) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 507955 + ... + 549563.

It is an arithmetic number, because the mean of its divisors is an integer number (565271850).

Almost surely, 2^22001133231 is an apocalyptic number.

22001133231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22001133231 is a deficient number, since it is larger than the sum of its proper divisors (18698439969).

22001133231 is a wasteful number, since it uses less digits than its factorization.

22001133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41749 (or 41739 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 22001133231 its reverse (13233110022), we get a palindrome (35234243253).

The spelling of 22001133231 in words is "twenty-two billion, one million, one hundred thirty-three thousand, two hundred thirty-one".