21111200211199 has 8 divisors (see below), whose sum is σ = 24127549757568. Its totient is φ = 18094966615320.

The previous prime is 21111200211187. The next prime is 21111200211203. The reversal of 21111200211199 is 99111200211112.

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

It is not a de Polignac number, because 21111200211199 - 2²⁷ = 21111065993471 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21111200211199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111200211109) 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, 28597117 + ... + 29326054.

It is an arithmetic number, because the mean of its divisors is an integer number (3015943719696).

Almost surely, 2^{21111200211199} is an apocalyptic number.

21111200211199 is a deficient number, since it is larger than the sum of its proper divisors (3016349546369).

21111200211199 is an equidigital number, since it uses as much as digits as its factorization.

21111200211199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57975245.

The product of its (nonzero) digits is 648, while the sum is 31.

The spelling of 21111200211199 in words is "twenty-one trillion, one hundred eleven billion, two hundred million, two hundred eleven thousand, one hundred ninety-nine".