331121221111313 has 4 divisors (see below), whose sum is σ = 332352155019060. Its totient is φ = 329890287203568.

The previous prime is 331121221111279. The next prime is 331121221111409. The reversal of 331121221111313 is 313111122121133.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10352512171024 + 320768708940289 = 3217532^2 + 17910017^2 .

It is a cyclic number.

It is not a de Polignac number, because 331121221111313 - 2²⁴ = 331121204334097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331121221111613) 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, 615466953470 + ... + 615466954007.

It is an arithmetic number, because the mean of its divisors is an integer number (83088038754765).

Almost surely, 2^{331121221111313} is an apocalyptic number.

It is an amenable number.

331121221111313 is a deficient number, since it is larger than the sum of its proper divisors (1230933907747).

331121221111313 is a wasteful number, since it uses less digits than its factorization.

331121221111313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230933907746.

The product of its digits is 648, while the sum is 26.

Adding to 331121221111313 its reverse (313111122121133), we get a palindrome (644232343232446).

The spelling of 331121221111313 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, three hundred thirteen".