3121331221297 has 2 divisors, whose sum is σ = 3121331221298. Its totient is φ = 3121331221296.

The previous prime is 3121331221279. The next prime is 3121331221339. The reversal of 3121331221297 is 7921221331213.

Together with previous prime (3121331221279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3110817590001 + 10513631296 = 1763751^2 + 102536^2 .

It is an emirp because it is prime and its reverse (7921221331213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3121331221297 - 2³⁵ = 3086971482929 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121331221207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560665610648 + 1560665610649.

It is an arithmetic number, because the mean of its divisors is an integer number (1560665610649).

Almost surely, 2^{3121331221297} is an apocalyptic number.

It is an amenable number.

3121331221297 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121331221297 is an equidigital number, since it uses as much as digits as its factorization.

3121331221297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The spelling of 3121331221297 in words is "three trillion, one hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-one thousand, two hundred ninety-seven".