21211000012199 has 4 divisors (see below), whose sum is σ = 21211011104880. Its totient is φ = 21210988919520.

The previous prime is 21211000012141. The next prime is 21211000012249. The reversal of 21211000012199 is 99121000011212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21211000012199 - 2²⁴ = 21210983234983 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 (21211000017199) 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, 1862507 + ... + 6774284.

It is an arithmetic number, because the mean of its divisors is an integer number (5302752776220).

Almost surely, 2^{21211000012199} is an apocalyptic number.

21211000012199 is a deficient number, since it is larger than the sum of its proper divisors (11092681).

21211000012199 is an equidigital number, since it uses as much as digits as its factorization.

21211000012199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092680.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 21211000012199 in words is "twenty-one trillion, two hundred eleven billion, twelve thousand, one hundred ninety-nine".