21012044332159 has 2 divisors, whose sum is σ = 21012044332160. Its totient is φ = 21012044332158.

The previous prime is 21012044332009. The next prime is 21012044332177. The reversal of 21012044332159 is 95123344021012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21012044332159 - 2⁹ = 21012044331647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21012044302159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506022166079 + 10506022166080.

It is an arithmetic number, because the mean of its divisors is an integer number (10506022166080).

Almost surely, 2^{21012044332159} is an apocalyptic number.

21012044332159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012044332159 is an equidigital number, since it uses as much as digits as its factorization.

21012044332159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 21012044332159 in words is "twenty-one trillion, twelve billion, forty-four million, three hundred thirty-two thousand, one hundred fifty-nine".