11869312540621 has 2 divisors, whose sum is σ = 11869312540622. Its totient is φ = 11869312540620.

The previous prime is 11869312540577. The next prime is 11869312540633. The reversal of 11869312540621 is 12604521396811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6145495538121 + 5723817002500 = 2479011^2 + 2392450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11869312540621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11869312540681) 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, 5934656270310 + 5934656270311.

It is an arithmetic number, because the mean of its divisors is an integer number (5934656270311).

Almost surely, 2^{11869312540621} is an apocalyptic number.

It is an amenable number.

11869312540621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11869312540621 is an equidigital number, since it uses as much as digits as its factorization.

11869312540621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 11869312540621 in words is "eleven trillion, eight hundred sixty-nine billion, three hundred twelve million, five hundred forty thousand, six hundred twenty-one".