11002121999 has 16 divisors (see below), whose sum is σ = 13018301856. Its totient is φ = 9183974400.

The previous prime is 11002121989. The next prime is 11002122011. The reversal of 11002121999 is 99912120011.

It is a cyclic number.

It is not a de Polignac number, because 11002121999 - 2²⁰ = 11001073423 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 (11002121959) 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 15 ways as a sum of consecutive naturals, for example, 709832 + ... + 725165.

It is an arithmetic number, because the mean of its divisors is an integer number (813643866).

Almost surely, 2^11002121999 is an apocalyptic number.

11002121999 is a deficient number, since it is larger than the sum of its proper divisors (2016179857).

11002121999 is a wasteful number, since it uses less digits than its factorization.

11002121999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435066.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 11002121999 in words is "eleven billion, two million, one hundred twenty-one thousand, nine hundred ninety-nine".