321310012061 has 2 divisors, whose sum is σ = 321310012062. Its totient is φ = 321310012060.

The previous prime is 321310011989. The next prime is 321310012103. The reversal of 321310012061 is 160210013123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243449480836 + 77860531225 = 493406^2 + 279035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321310012061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321310014061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160655006030 + 160655006031.

It is an arithmetic number, because the mean of its divisors is an integer number (160655006031).

Almost surely, 2^321310012061 is an apocalyptic number.

It is an amenable number.

321310012061 is a deficient number, since it is larger than the sum of its proper divisors (1).

321310012061 is an equidigital number, since it uses as much as digits as its factorization.

321310012061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 321310012061 its reverse (160210013123), we get a palindrome (481520025184).

The spelling of 321310012061 in words is "three hundred twenty-one billion, three hundred ten million, twelve thousand, sixty-one".