21110020199 has 8 divisors (see below), whose sum is σ = 21951107760. Its totient is φ = 20276476416.

The previous prime is 21110020159. The next prime is 21110020231. The reversal of 21110020199 is 99102001112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110020199 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 (21110020159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1880237 + ... + 1891430.

It is an arithmetic number, because the mean of its divisors is an integer number (2743888470).

Almost surely, 2^21110020199 is an apocalyptic number.

21110020199 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21110020199 is a deficient number, since it is larger than the sum of its proper divisors (841087561).

21110020199 is a wasteful number, since it uses less digits than its factorization.

21110020199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771889.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 21110020199 in words is "twenty-one billion, one hundred ten million, twenty thousand, one hundred ninety-nine".