231320010121 has 4 divisors (see below), whose sum is σ = 236241712512. Its totient is φ = 226398307732.

The previous prime is 231320010113. The next prime is 231320010127. The reversal of 231320010121 is 121010023132.

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 231320010121 - 2³ = 231320010113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231320010095 and 231320010104.

It is not an unprimeable number, because it can be changed into a prime (231320010127) 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, 2460851125 + ... + 2460851218.

It is an arithmetic number, because the mean of its divisors is an integer number (59060428128).

Almost surely, 2^231320010121 is an apocalyptic number.

It is an amenable number.

231320010121 is a deficient number, since it is larger than the sum of its proper divisors (4921702391).

231320010121 is an equidigital number, since it uses as much as digits as its factorization.

231320010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921702390.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 231320010121 its reverse (121010023132), we get a palindrome (352330033253).

The spelling of 231320010121 in words is "two hundred thirty-one billion, three hundred twenty million, ten thousand, one hundred twenty-one".