313103312111321 has 2 divisors, whose sum is σ = 313103312111322. Its totient is φ = 313103312111320.

The previous prime is 313103312111287. The next prime is 313103312111357. The reversal of 313103312111321 is 123111213301313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284457267271321 + 28646044840000 = 16865861^2 + 5352200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313103312111321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (313103312911321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156551656055660 + 156551656055661.

It is an arithmetic number, because the mean of its divisors is an integer number (156551656055661).

Almost surely, 2^{313103312111321} is an apocalyptic number.

It is an amenable number.

313103312111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

313103312111321 is an equidigital number, since it uses as much as digits as its factorization.

313103312111321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 313103312111321 its reverse (123111213301313), we get a palindrome (436214525412634).

The spelling of 313103312111321 in words is "three hundred thirteen trillion, one hundred three billion, three hundred twelve million, one hundred eleven thousand, three hundred twenty-one".