13211001961 has 2 divisors, whose sum is σ = 13211001962. Its totient is φ = 13211001960.

The previous prime is 13211001893. The next prime is 13211002027. The reversal of 13211001961 is 16910011231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13024515625 + 186486336 = 114125^2 + 13656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13211001961 is a prime.

It is not a weakly prime, because it can be changed into another prime (13211005961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6605500980 + 6605500981.

It is an arithmetic number, because the mean of its divisors is an integer number (6605500981).

Almost surely, 2^13211001961 is an apocalyptic number.

It is an amenable number.

13211001961 is a deficient number, since it is larger than the sum of its proper divisors (1).

13211001961 is an equidigital number, since it uses as much as digits as its factorization.

13211001961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 13211001961 in words is "thirteen billion, two hundred eleven million, one thousand, nine hundred sixty-one".