13207457461721 has 2 divisors, whose sum is σ = 13207457461722. Its totient is φ = 13207457461720.

The previous prime is 13207457461637. The next prime is 13207457461739. The reversal of 13207457461721 is 12716475470231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10573292755600 + 2634164706121 = 3251660^2 + 1623011^2 .

It is a cyclic number.

It is not a de Polignac number, because 13207457461721 - 2¹⁴ = 13207457445337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13207457461721.

It is not a weakly prime, because it can be changed into another prime (13207457461771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6603728730860 + 6603728730861.

It is an arithmetic number, because the mean of its divisors is an integer number (6603728730861).

Almost surely, 2^{13207457461721} is an apocalyptic number.

It is an amenable number.

13207457461721 is a deficient number, since it is larger than the sum of its proper divisors (1).

13207457461721 is an equidigital number, since it uses as much as digits as its factorization.

13207457461721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 13207457461721 in words is "thirteen trillion, two hundred seven billion, four hundred fifty-seven million, four hundred sixty-one thousand, seven hundred twenty-one".