331231113121 has 4 divisors (see below), whose sum is σ = 332617017600. Its totient is φ = 329845208644.

The previous prime is 331231113107. The next prime is 331231113203. The reversal of 331231113121 is 121311132133.

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 331231113121 - 2¹¹ = 331231111073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331231113092 and 331231113101.

It is not an unprimeable number, because it can be changed into a prime (331231113721) 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, 692951881 + ... + 692952358.

It is an arithmetic number, because the mean of its divisors is an integer number (83154254400).

Almost surely, 2^331231113121 is an apocalyptic number.

It is an amenable number.

331231113121 is a deficient number, since it is larger than the sum of its proper divisors (1385904479).

331231113121 is a wasteful number, since it uses less digits than its factorization.

331231113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385904478.

The product of its digits is 324, while the sum is 22.

Adding to 331231113121 its reverse (121311132133), we get a palindrome (452542245254).

The spelling of 331231113121 in words is "three hundred thirty-one billion, two hundred thirty-one million, one hundred thirteen thousand, one hundred twenty-one".