21000023332291 has 2 divisors, whose sum is σ = 21000023332292. Its totient is φ = 21000023332290.

The previous prime is 21000023332259. The next prime is 21000023332373. The reversal of 21000023332291 is 19223332000012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000023332291 - 2⁵ = 21000023332259 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000023332201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500011666145 + 10500011666146.

It is an arithmetic number, because the mean of its divisors is an integer number (10500011666146).

Almost surely, 2^{21000023332291} is an apocalyptic number.

21000023332291 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000023332291 is an equidigital number, since it uses as much as digits as its factorization.

21000023332291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 21000023332291 in words is "twenty-one trillion, twenty-three million, three hundred thirty-two thousand, two hundred ninety-one".