21499841126411 has 2 divisors, whose sum is σ = 21499841126412. Its totient is φ = 21499841126410.

The previous prime is 21499841126369. The next prime is 21499841126443. The reversal of 21499841126411 is 11462114899412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21499841126411 - 2¹⁰ = 21499841125387 is a prime.

It is not a weakly prime, because it can be changed into another prime (21499841126461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10749920563205 + 10749920563206.

It is an arithmetic number, because the mean of its divisors is an integer number (10749920563206).

Almost surely, 2^{21499841126411} is an apocalyptic number.

21499841126411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21499841126411 is an equidigital number, since it uses as much as digits as its factorization.

21499841126411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 53.

The spelling of 21499841126411 in words is "twenty-one trillion, four hundred ninety-nine billion, eight hundred forty-one million, one hundred twenty-six thousand, four hundred eleven".