331303112981 has 2 divisors, whose sum is σ = 331303112982. Its totient is φ = 331303112980.

The previous prime is 331303112969. The next prime is 331303113041. The reversal of 331303112981 is 189211303133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331286580625 + 16532356 = 575575^2 + 4066^2 .

It is an emirp because it is prime and its reverse (189211303133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331303112981 - 2²² = 331298918677 is a prime.

It is a super-2 number, since 2×331303112981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331303112281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165651556490 + 165651556491.

It is an arithmetic number, because the mean of its divisors is an integer number (165651556491).

Almost surely, 2^331303112981 is an apocalyptic number.

It is an amenable number.

331303112981 is a deficient number, since it is larger than the sum of its proper divisors (1).

331303112981 is an equidigital number, since it uses as much as digits as its factorization.

331303112981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 331303112981 in words is "three hundred thirty-one billion, three hundred three million, one hundred twelve thousand, nine hundred eighty-one".