21011002221199 has 8 divisors (see below), whose sum is σ = 21014476328160. Its totient is φ = 21007528370400.

The previous prime is 21011002221161. The next prime is 21011002221203. The reversal of 21011002221199 is 99112220011012.

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-21011002221199 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 21011002221199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011002221119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225299022 + ... + 225392260.

It is an arithmetic number, because the mean of its divisors is an integer number (2626809541020).

Almost surely, 2^{21011002221199} is an apocalyptic number.

21011002221199 is a deficient number, since it is larger than the sum of its proper divisors (3474106961).

21011002221199 is an equidigital number, since it uses as much as digits as its factorization.

21011002221199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128081.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 21011002221199 in words is "twenty-one trillion, eleven billion, two million, two hundred twenty-one thousand, one hundred ninety-nine".