21011102199 has 24 divisors (see below), whose sum is σ = 31225858560. Its totient is φ = 13604234688.

The previous prime is 21011102191. The next prime is 21011102219. The reversal of 21011102199 is 99120111012.

It is not a de Polignac number, because 21011102199 - 2³ = 21011102191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011102191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128842 + ... + 242120.

It is an arithmetic number, because the mean of its divisors is an integer number (1301077440).

Almost surely, 2^21011102199 is an apocalyptic number.

21011102199 is a deficient number, since it is larger than the sum of its proper divisors (10214756361).

21011102199 is a wasteful number, since it uses less digits than its factorization.

21011102199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113879 (or 113876 counting only the distinct ones).

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

The spelling of 21011102199 in words is "twenty-one billion, eleven million, one hundred two thousand, one hundred ninety-nine".