20201232231 has 12 divisors (see below), whose sum is σ = 30715324120. Its totient is φ = 12758672880.

The previous prime is 20201232223. The next prime is 20201232239. The reversal of 20201232231 is 13223210202.

20201232231 is a `hidden beast` number, since 2 + 0 + 201 + 232 + 231 = 666.

It is an interprime number because it is at equal distance from previous prime (20201232223) and next prime (20201232239).

It is not a de Polignac number, because 20201232231 - 2³ = 20201232223 is a prime.

It is a super-2 number, since 2×20201232231² (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 (20201232239) 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, 59067760 + ... + 59068101.

Almost surely, 2^20201232231 is an apocalyptic number.

20201232231 is a deficient number, since it is larger than the sum of its proper divisors (10514091889).

20201232231 is a wasteful number, since it uses less digits than its factorization.

20201232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118135886 (or 118135883 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20201232231 its reverse (13223210202), we get a palindrome (33424442433).

The spelling of 20201232231 in words is "twenty billion, two hundred one million, two hundred thirty-two thousand, two hundred thirty-one".