331123111013 has 4 divisors (see below), whose sum is σ = 332581803360. Its totient is φ = 329664418668.

The previous prime is 331123111009. The next prime is 331123111043. The reversal of 331123111013 is 310111321133.

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, and also an emirpimes, since its reverse is a distinct semiprime: 310111321133 = 59 ⋅5256124087.

It is a cyclic number.

It is not a de Polignac number, because 331123111013 - 2² = 331123111009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331123111043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729345833 + ... + 729346286.

It is an arithmetic number, because the mean of its divisors is an integer number (83145450840).

Almost surely, 2^331123111013 is an apocalyptic number.

It is an amenable number.

331123111013 is a deficient number, since it is larger than the sum of its proper divisors (1458692347).

331123111013 is a wasteful number, since it uses less digits than its factorization.

331123111013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458692346.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 331123111013 its reverse (310111321133), we get a palindrome (641234432146).

The spelling of 331123111013 in words is "three hundred thirty-one billion, one hundred twenty-three million, one hundred eleven thousand, thirteen".