21211100159 has 2 divisors, whose sum is σ = 21211100160. Its totient is φ = 21211100158.

The previous prime is 21211100153. The next prime is 21211100203. The reversal of 21211100159 is 95100111212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211100159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211100153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605550079 + 10605550080.

It is an arithmetic number, because the mean of its divisors is an integer number (10605550080).

Almost surely, 2^21211100159 is an apocalyptic number.

21211100159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211100159 is an equidigital number, since it uses as much as digits as its factorization.

21211100159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 23.

The spelling of 21211100159 in words is "twenty-one billion, two hundred eleven million, one hundred thousand, one hundred fifty-nine".