21119716199 has 4 divisors (see below), whose sum is σ = 22362052464. Its totient is φ = 19877379936.

The previous prime is 21119716153. The next prime is 21119716207. The reversal of 21119716199 is 99161791112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21119716199 - 2²⁰ = 21118667623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21119716129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621168107 + ... + 621168140.

It is an arithmetic number, because the mean of its divisors is an integer number (5590513116).

Almost surely, 2^21119716199 is an apocalyptic number.

21119716199 is a deficient number, since it is larger than the sum of its proper divisors (1242336265).

21119716199 is a wasteful number, since it uses less digits than its factorization.

21119716199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242336264.

The product of its digits is 61236, while the sum is 47.

The spelling of 21119716199 in words is "twenty-one billion, one hundred nineteen million, seven hundred sixteen thousand, one hundred ninety-nine".