21001333159 has 2 divisors, whose sum is σ = 21001333160. Its totient is φ = 21001333158.

The previous prime is 21001333127. The next prime is 21001333169. The reversal of 21001333159 is 95133310012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21001333159 - 2⁵ = 21001333127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21001333169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500666579 + 10500666580.

It is an arithmetic number, because the mean of its divisors is an integer number (10500666580).

Almost surely, 2^21001333159 is an apocalyptic number.

21001333159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001333159 is an equidigital number, since it uses as much as digits as its factorization.

21001333159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 28.

The spelling of 21001333159 in words is "twenty-one billion, one million, three hundred thirty-three thousand, one hundred fifty-nine".