11002121021999 has 4 divisors (see below), whose sum is σ = 11480474109936. Its totient is φ = 10523767934064.

The previous prime is 11002121021989. The next prime is 11002121022037. The reversal of 11002121021999 is 99912012120011.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11002121021999 - 2²⁴ = 11002104244783 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 (11002121021939) 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 3 ways as a sum of consecutive naturals, for example, 239176543934 + ... + 239176543979.

It is an arithmetic number, because the mean of its divisors is an integer number (2870118527484).

Almost surely, 2^{11002121021999} is an apocalyptic number.

11002121021999 is a deficient number, since it is larger than the sum of its proper divisors (478353087937).

11002121021999 is an equidigital number, since it uses as much as digits as its factorization.

11002121021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478353087936.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 11002121021999 in words is "eleven trillion, two billion, one hundred twenty-one million, twenty-one thousand, nine hundred ninety-nine".