231321213011121 has 4 divisors (see below), whose sum is σ = 308428284014832. Its totient is φ = 154214142007412.

The previous prime is 231321213011113. The next prime is 231321213011131. The reversal of 231321213011121 is 121110312123132.

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 231321213011121 - 2³ = 231321213011113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231321213011091 and 231321213011100.

It is not an unprimeable number, because it can be changed into a prime (231321213011131) 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, 38553535501851 + ... + 38553535501856.

It is an arithmetic number, because the mean of its divisors is an integer number (77107071003708).

Almost surely, 2^{231321213011121} is an apocalyptic number.

It is an amenable number.

231321213011121 is a deficient number, since it is larger than the sum of its proper divisors (77107071003711).

231321213011121 is an equidigital number, since it uses as much as digits as its factorization.

231321213011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77107071003710.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 231321213011121 its reverse (121110312123132), we get a palindrome (352431525134253).

The spelling of 231321213011121 in words is "two hundred thirty-one trillion, three hundred twenty-one billion, two hundred thirteen million, eleven thousand, one hundred twenty-one".