331111121311 has 4 divisors (see below), whose sum is σ = 350588246112. Its totient is φ = 311633996512.

The previous prime is 331111121273. The next prime is 331111121347. The reversal of 331111121311 is 113121111133.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331111121311 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 (331111121351) 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, 9738562375 + ... + 9738562408.

It is an arithmetic number, because the mean of its divisors is an integer number (87647061528).

Almost surely, 2^331111121311 is an apocalyptic number.

331111121311 is a deficient number, since it is larger than the sum of its proper divisors (19477124801).

331111121311 is a wasteful number, since it uses less digits than its factorization.

331111121311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19477124800.

The product of its digits is 54, while the sum is 19.

Adding to 331111121311 its reverse (113121111133), we get a palindrome (444232232444).

The spelling of 331111121311 in words is "three hundred thirty-one billion, one hundred eleven million, one hundred twenty-one thousand, three hundred eleven".