21102122120159 has 2 divisors, whose sum is σ = 21102122120160. Its totient is φ = 21102122120158.

The previous prime is 21102122120083. The next prime is 21102122120161. The reversal of 21102122120159 is 95102122120112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102122120159 - 2²⁰ = 21102121071583 is a prime.

Together with 21102122120161, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21102122120759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551061060079 + 10551061060080.

It is an arithmetic number, because the mean of its divisors is an integer number (10551061060080).

Almost surely, 2^{21102122120159} is an apocalyptic number.

21102122120159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102122120159 is an equidigital number, since it uses as much as digits as its factorization.

21102122120159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The spelling of 21102122120159 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, one hundred twenty thousand, one hundred fifty-nine".