21302133091 has 2 divisors, whose sum is σ = 21302133092. Its totient is φ = 21302133090.

The previous prime is 21302133007. The next prime is 21302133133. The reversal of 21302133091 is 19033120312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21302133091 - 2²⁵ = 21268578659 is a prime.

It is not a weakly prime, because it can be changed into another prime (21302133191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651066545 + 10651066546.

It is an arithmetic number, because the mean of its divisors is an integer number (10651066546).

Almost surely, 2^21302133091 is an apocalyptic number.

21302133091 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302133091 is an equidigital number, since it uses as much as digits as its factorization.

21302133091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The spelling of 21302133091 in words is "twenty-one billion, three hundred two million, one hundred thirty-three thousand, ninety-one".