20133212231 has 12 divisors (see below), whose sum is σ = 23180323464. Its totient is φ = 17339605200.

The previous prime is 20133212201. The next prime is 20133212243. The reversal of 20133212231 is 13221233102.

It is not a de Polignac number, because 20133212231 - 2¹⁸ = 20132950087 is a prime.

It is a super-2 number, since 2×20133212231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133212201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2531060 + ... + 2539001.

It is an arithmetic number, because the mean of its divisors is an integer number (1931693622).

Almost surely, 2^20133212231 is an apocalyptic number.

20133212231 is a deficient number, since it is larger than the sum of its proper divisors (3047111233).

20133212231 is a wasteful number, since it uses less digits than its factorization.

20133212231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070110 (or 5070091 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20133212231 its reverse (13221233102), we get a palindrome (33354445333).

The spelling of 20133212231 in words is "twenty billion, one hundred thirty-three million, two hundred twelve thousand, two hundred thirty-one".