21111011100199 has 8 divisors (see below), whose sum is σ = 21570572845440. Its totient is φ = 20654840955000.

The previous prime is 21111011100187. The next prime is 21111011100229. The reversal of 21111011100199 is 99100111011112.

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

It is a cyclic number.

It is not a de Polignac number, because 21111011100199 - 2³⁹ = 20561255286311 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 (21111011100149) 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, 847887427 + ... + 847912324.

It is an arithmetic number, because the mean of its divisors is an integer number (2696321605680).

Almost surely, 2^{21111011100199} is an apocalyptic number.

21111011100199 is a deficient number, since it is larger than the sum of its proper divisors (459561745241).

21111011100199 is a wasteful number, since it uses less digits than its factorization.

21111011100199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695800021.

The product of its (nonzero) digits is 162, while the sum is 28.

The spelling of 21111011100199 in words is "twenty-one trillion, one hundred eleven billion, eleven million, one hundred thousand, one hundred ninety-nine".