21253213068511 has 2 divisors, whose sum is σ = 21253213068512. Its totient is φ = 21253213068510.

The previous prime is 21253213068473. The next prime is 21253213068523. The reversal of 21253213068511 is 11586031235212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21253213068511 - 2²⁵ = 21253179514079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21253213068551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10626606534255 + 10626606534256.

It is an arithmetic number, because the mean of its divisors is an integer number (10626606534256).

Almost surely, 2^{21253213068511} is an apocalyptic number.

21253213068511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21253213068511 is an equidigital number, since it uses as much as digits as its factorization.

21253213068511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 21253213068511 in words is "twenty-one trillion, two hundred fifty-three billion, two hundred thirteen million, sixty-eight thousand, five hundred eleven".