20112321231 has 6 divisors (see below), whose sum is σ = 29051130680. Its totient is φ = 13408214148.

The previous prime is 20112321211. The next prime is 20112321269. The reversal of 20112321231 is 13212321102.

20112321231 is a `hidden beast` number, since 2 + 0 + 112 + 321 + 231 = 666.

It is not a de Polignac number, because 20112321231 - 2⁶ = 20112321167 is a prime.

It is a super-2 number, since 2×20112321231² (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 (20112321211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1117351171 + ... + 1117351188.

Almost surely, 2^20112321231 is an apocalyptic number.

20112321231 is a deficient number, since it is larger than the sum of its proper divisors (8938809449).

20112321231 is a wasteful number, since it uses less digits than its factorization.

20112321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234702365 (or 2234702362 counting only the distinct ones).

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

Adding to 20112321231 its reverse (13212321102), we get a palindrome (33324642333).

The spelling of 20112321231 in words is "twenty billion, one hundred twelve million, three hundred twenty-one thousand, two hundred thirty-one".