21366866114299 has 2 divisors, whose sum is σ = 21366866114300. Its totient is φ = 21366866114298.

The previous prime is 21366866114291. The next prime is 21366866114327. The reversal of 21366866114299 is 99241166866312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21366866114299 - 2³ = 21366866114291 is a prime.

It is a super-2 number, since 2×21366866114299² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21366866114299.

It is not a weakly prime, because it can be changed into another prime (21366866114291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10683433057149 + 10683433057150.

It is an arithmetic number, because the mean of its divisors is an integer number (10683433057150).

Almost surely, 2^{21366866114299} is an apocalyptic number.

21366866114299 is a deficient number, since it is larger than the sum of its proper divisors (1).

21366866114299 is an equidigital number, since it uses as much as digits as its factorization.

21366866114299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40310784, while the sum is 64.

The spelling of 21366866114299 in words is "twenty-one trillion, three hundred sixty-six billion, eight hundred sixty-six million, one hundred fourteen thousand, two hundred ninety-nine".