21202100099999 has 32 divisors (see below), whose sum is σ = 26466821176320. Its totient is φ = 16536269433600.

The previous prime is 21202100099969. The next prime is 21202100100011. The reversal of 21202100099999 is 99999000120212.

It is not a de Polignac number, because 21202100099999 - 2⁸ = 21202100099743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21202100099999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202100099969) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39071564 + ... + 39610494.

It is an arithmetic number, because the mean of its divisors is an integer number (827088161760).

Almost surely, 2^{21202100099999} is an apocalyptic number.

21202100099999 is a deficient number, since it is larger than the sum of its proper divisors (5264721076321).

21202100099999 is a wasteful number, since it uses less digits than its factorization.

21202100099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545111.

The product of its (nonzero) digits is 472392, while the sum is 53.

The spelling of 21202100099999 in words is "twenty-one trillion, two hundred two billion, one hundred million, ninety-nine thousand, nine hundred ninety-nine".