21201011112199 has 4 divisors (see below), whose sum is σ = 21201047849664. Its totient is φ = 21200974374736.

The previous prime is 21201011112181. The next prime is 21201011112367. The reversal of 21201011112199 is 99121111010212.

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 21201011112199 - 2²³ = 21201002723591 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 21201011112199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201011112139) 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 3 ways as a sum of consecutive naturals, for example, 17489047 + ... + 18661960.

It is an arithmetic number, because the mean of its divisors is an integer number (5300261962416).

Almost surely, 2^{21201011112199} is an apocalyptic number.

21201011112199 is a deficient number, since it is larger than the sum of its proper divisors (36737465).

21201011112199 is an equidigital number, since it uses as much as digits as its factorization.

21201011112199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36737464.

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

The spelling of 21201011112199 in words is "twenty-one trillion, two hundred one billion, eleven million, one hundred twelve thousand, one hundred ninety-nine".