11884297864721 has 2 divisors, whose sum is σ = 11884297864722. Its totient is φ = 11884297864720.

The previous prime is 11884297864693. The next prime is 11884297864729. The reversal of 11884297864721 is 12746879248811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11884297864321 + 400 = 3447361^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 11884297864721 - 2³⁰ = 11883224122897 is a prime.

It is not a weakly prime, because it can be changed into another prime (11884297864729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5942148932360 + 5942148932361.

It is an arithmetic number, because the mean of its divisors is an integer number (5942148932361).

Almost surely, 2^{11884297864721} is an apocalyptic number.

It is an amenable number.

11884297864721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11884297864721 is an equidigital number, since it uses as much as digits as its factorization.

11884297864721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86704128, while the sum is 68.

The spelling of 11884297864721 in words is "eleven trillion, eight hundred eighty-four billion, two hundred ninety-seven million, eight hundred sixty-four thousand, seven hundred twenty-one".