13021987746899 has 2 divisors, whose sum is σ = 13021987746900. Its totient is φ = 13021987746898.

The previous prime is 13021987746883. The next prime is 13021987746941. The reversal of 13021987746899 is 99864778912031.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13021987746899 - 2⁴ = 13021987746883 is a prime.

It is not a weakly prime, because it can be changed into another prime (13021987746839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510993873449 + 6510993873450.

It is an arithmetic number, because the mean of its divisors is an integer number (6510993873450).

Almost surely, 2^{13021987746899} is an apocalyptic number.

13021987746899 is a deficient number, since it is larger than the sum of its proper divisors (1).

13021987746899 is an equidigital number, since it uses as much as digits as its factorization.

13021987746899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 329204736, while the sum is 74.

The spelling of 13021987746899 in words is "thirteen trillion, twenty-one billion, nine hundred eighty-seven million, seven hundred forty-six thousand, eight hundred ninety-nine".