13963390121 has 2 divisors, whose sum is σ = 13963390122. Its totient is φ = 13963390120.

The previous prime is 13963390099. The next prime is 13963390169. The reversal of 13963390121 is 12109336931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13371684496 + 591705625 = 115636^2 + 24325^2 .

It is a cyclic number.

It is not a de Polignac number, because 13963390121 - 2⁶ = 13963390057 is a prime.

It is not a weakly prime, because it can be changed into another prime (13963390421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6981695060 + 6981695061.

It is an arithmetic number, because the mean of its divisors is an integer number (6981695061).

Almost surely, 2^13963390121 is an apocalyptic number.

It is an amenable number.

13963390121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13963390121 is an equidigital number, since it uses as much as digits as its factorization.

13963390121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 38.

The spelling of 13963390121 in words is "thirteen billion, nine hundred sixty-three million, three hundred ninety thousand, one hundred twenty-one".