21100010199 has 16 divisors (see below), whose sum is σ = 28506878208. Its totient is φ = 13880932352.

The previous prime is 21100010177. The next prime is 21100010213. The reversal of 21100010199 is 99101000112.

It is a cyclic number.

It is not a de Polignac number, because 21100010199 - 2⁵ = 21100010167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100010119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45387 + ... + 210380.

It is an arithmetic number, because the mean of its divisors is an integer number (1781679888).

Almost surely, 2^21100010199 is an apocalyptic number.

21100010199 is a deficient number, since it is larger than the sum of its proper divisors (7406868009).

21100010199 is a wasteful number, since it uses less digits than its factorization.

21100010199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256134.

The product of its (nonzero) digits is 162, while the sum is 24.

The spelling of 21100010199 in words is "twenty-one billion, one hundred million, ten thousand, one hundred ninety-nine".