21335345331899 has 2 divisors, whose sum is σ = 21335345331900. Its totient is φ = 21335345331898.

The previous prime is 21335345331877. The next prime is 21335345331913. The reversal of 21335345331899 is 99813354353312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21335345331899 is a prime.

It is not a weakly prime, because it can be changed into another prime (21335345331869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667672665949 + 10667672665950.

It is an arithmetic number, because the mean of its divisors is an integer number (10667672665950).

Almost surely, 2^{21335345331899} is an apocalyptic number.

21335345331899 is a deficient number, since it is larger than the sum of its proper divisors (1).

21335345331899 is an equidigital number, since it uses as much as digits as its factorization.

21335345331899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31492800, while the sum is 59.

The spelling of 21335345331899 in words is "twenty-one trillion, three hundred thirty-five billion, three hundred forty-five million, three hundred thirty-one thousand, eight hundred ninety-nine".