13220100961 has 2 divisors, whose sum is σ = 13220100962. Its totient is φ = 13220100960.

The previous prime is 13220100937. The next prime is 13220100973. The reversal of 13220100961 is 16900102231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7824463936 + 5395637025 = 88456^2 + 73455^2 .

It is an emirp because it is prime and its reverse (16900102231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13220100961 - 2³³ = 4630166369 is a prime.

It is not a weakly prime, because it can be changed into another prime (13220103961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610050480 + 6610050481.

It is an arithmetic number, because the mean of its divisors is an integer number (6610050481).

Almost surely, 2^13220100961 is an apocalyptic number.

It is an amenable number.

13220100961 is a deficient number, since it is larger than the sum of its proper divisors (1).

13220100961 is an equidigital number, since it uses as much as digits as its factorization.

13220100961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 13220100961 in words is "thirteen billion, two hundred twenty million, one hundred thousand, nine hundred sixty-one".