20310013231121 has 4 divisors (see below), whose sum is σ = 21193057284672. Its totient is φ = 19426969177572.

The previous prime is 20310013231087. The next prime is 20310013231127. The reversal of 20310013231121 is 12113231001302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20310013231121 - 2¹⁰ = 20310013230097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20310013231093 and 20310013231102.

It is not an unprimeable number, because it can be changed into a prime (20310013231127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441522026741 + ... + 441522026786.

It is an arithmetic number, because the mean of its divisors is an integer number (5298264321168).

Almost surely, 2^{20310013231121} is an apocalyptic number.

It is an amenable number.

20310013231121 is a deficient number, since it is larger than the sum of its proper divisors (883044053551).

20310013231121 is an equidigital number, since it uses as much as digits as its factorization.

20310013231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883044053550.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20310013231121 its reverse (12113231001302), we get a palindrome (32423244232423).

The spelling of 20310013231121 in words is "twenty trillion, three hundred ten billion, thirteen million, two hundred thirty-one thousand, one hundred twenty-one".