21001110210099 has 6 divisors (see below), whose sum is σ = 30334936970156. Its totient is φ = 14000740140060.

The previous prime is 21001110210097. The next prime is 21001110210103. The reversal of 21001110210099 is 99001201110012.

It is not a de Polignac number, because 21001110210099 - 2¹ = 21001110210097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21001110210097) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1166728344997 + ... + 1166728345014.

Almost surely, 2^{21001110210099} is an apocalyptic number.

21001110210099 is a deficient number, since it is larger than the sum of its proper divisors (9333826760057).

21001110210099 is a wasteful number, since it uses less digits than its factorization.

21001110210099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333456690017 (or 2333456690014 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 21001110210099 in words is "twenty-one trillion, one billion, one hundred ten million, two hundred ten thousand, ninety-nine".