331121220312131 has 2 divisors, whose sum is σ = 331121220312132. Its totient is φ = 331121220312130.

The previous prime is 331121220312083. The next prime is 331121220312191. The reversal of 331121220312131 is 131213022121133.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331121220312131 is a prime.

It is a super-2 number, since 2×331121220312131² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 331121220312131.

It is not a weakly prime, because it can be changed into another prime (331121220312191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165560610156065 + 165560610156066.

It is an arithmetic number, because the mean of its divisors is an integer number (165560610156066).

Almost surely, 2^{331121220312131} is an apocalyptic number.

331121220312131 is a deficient number, since it is larger than the sum of its proper divisors (1).

331121220312131 is an equidigital number, since it uses as much as digits as its factorization.

331121220312131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 331121220312131 its reverse (131213022121133), we get a palindrome (462334242433264).

The spelling of 331121220312131 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, two hundred twenty million, three hundred twelve thousand, one hundred thirty-one".