21011000102159 has 2 divisors, whose sum is σ = 21011000102160. Its totient is φ = 21011000102158.

The previous prime is 21011000102117. The next prime is 21011000102221. The reversal of 21011000102159 is 95120100011012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21011000102159 is a prime.

It is a super-2 number, since 2×21011000102159² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011000102359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505500051079 + 10505500051080.

It is an arithmetic number, because the mean of its divisors is an integer number (10505500051080).

Almost surely, 2^{21011000102159} is an apocalyptic number.

21011000102159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011000102159 is an equidigital number, since it uses as much as digits as its factorization.

21011000102159 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 21011000102159 in words is "twenty-one trillion, eleven billion, one hundred two thousand, one hundred fifty-nine".