31311303330121 has 2 divisors, whose sum is σ = 31311303330122. Its totient is φ = 31311303330120.

The previous prime is 31311303330107. The next prime is 31311303330127. The reversal of 31311303330121 is 12103330311313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29845898659600 + 1465404670521 = 5463140^2 + 1210539^2 .

It is an emirp because it is prime and its reverse (12103330311313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31311303330121 - 2⁹ = 31311303329609 is a prime.

It is not a weakly prime, because it can be changed into another prime (31311303330127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655651665060 + 15655651665061.

It is an arithmetic number, because the mean of its divisors is an integer number (15655651665061).

Almost surely, 2^{31311303330121} is an apocalyptic number.

It is an amenable number.

31311303330121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311303330121 is an equidigital number, since it uses as much as digits as its factorization.

31311303330121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31311303330121 its reverse (12103330311313), we get a palindrome (43414633641434).

The spelling of 31311303330121 in words is "thirty-one trillion, three hundred eleven billion, three hundred three million, three hundred thirty thousand, one hundred twenty-one".