21120210002091 has 16 divisors (see below), whose sum is σ = 28922910942464. Its totient is φ = 13698865118304.

The previous prime is 21120210002077. The next prime is 21120210002113. The reversal of 21120210002091 is 19020001202112.

It is not a de Polignac number, because 21120210002091 - 2³⁰ = 21119136260267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120210002041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2978575 + ... + 7149288.

It is an arithmetic number, because the mean of its divisors is an integer number (1807681933904).

Almost surely, 2^{21120210002091} is an apocalyptic number.

21120210002091 is a deficient number, since it is larger than the sum of its proper divisors (7802700940373).

21120210002091 is a wasteful number, since it uses less digits than its factorization.

21120210002091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10146690.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 21120210002091 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, two thousand, ninety-one".