20321201120231 has 24 divisors (see below), whose sum is σ = 22380896870640. Its totient is φ = 18437144190080.

The previous prime is 20321201120147. The next prime is 20321201120239. The reversal of 20321201120231 is 13202110212302.

It is not a de Polignac number, because 20321201120231 - 2¹⁸ = 20321200858087 is a prime.

It is a super-2 number, since 2×20321201120231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321201120239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210409805 + ... + 210506361.

It is an arithmetic number, because the mean of its divisors is an integer number (932537369610).

Almost surely, 2^{20321201120231} is an apocalyptic number.

20321201120231 is a deficient number, since it is larger than the sum of its proper divisors (2059695750409).

20321201120231 is a wasteful number, since it uses less digits than its factorization.

20321201120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100015 (or 100004 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20321201120231 its reverse (13202110212302), we get a palindrome (33523311332533).

The spelling of 20321201120231 in words is "twenty trillion, three hundred twenty-one billion, two hundred one million, one hundred twenty thousand, two hundred thirty-one".