21001112210159 has 2 divisors, whose sum is σ = 21001112210160. Its totient is φ = 21001112210158.

The previous prime is 21001112210153. The next prime is 21001112210251. The reversal of 21001112210159 is 95101221110012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21001112210159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21001112210153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500556105079 + 10500556105080.

It is an arithmetic number, because the mean of its divisors is an integer number (10500556105080).

Almost surely, 2^{21001112210159} is an apocalyptic number.

21001112210159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001112210159 is an equidigital number, since it uses as much as digits as its factorization.

21001112210159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 26.

The spelling of 21001112210159 in words is "twenty-one trillion, one billion, one hundred twelve million, two hundred ten thousand, one hundred fifty-nine".