20123301231 has 64 divisors (see below), whose sum is σ = 33778598400. Its totient is φ = 11728281600.

The previous prime is 20123301203. The next prime is 20123301311. The reversal of 20123301231 is 13210332102.

20123301231 is a `hidden beast` number, since 201 + 233 + 0 + 1 + 231 = 666.

It is not a de Polignac number, because 20123301231 - 2⁹ = 20123300719 is a prime.

It is a super-2 number, since 2×20123301231² (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 (20123309231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2208996 + ... + 2218086.

It is an arithmetic number, because the mean of its divisors is an integer number (527790600).

Almost surely, 2^20123301231 is an apocalyptic number.

20123301231 is a deficient number, since it is larger than the sum of its proper divisors (13655297169).

20123301231 is a wasteful number, since it uses less digits than its factorization.

20123301231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9397 (or 9391 counting only the distinct ones).

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

Adding to 20123301231 its reverse (13210332102), we get a palindrome (33333633333).

It can be divided in two parts, 2012330 and 1231, that added together give a square (2013561 = 1419²).

The spelling of 20123301231 in words is "twenty billion, one hundred twenty-three million, three hundred one thousand, two hundred thirty-one".