11002001021 has 16 divisors (see below), whose sum is σ = 12166459200. Its totient is φ = 9865468800.

The previous prime is 11002001011. The next prime is 11002001041. The reversal of 11002001021 is 12010020011.

It is not a de Polignac number, because 11002001021 - 2²² = 10997806717 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 (11002001011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396791 + ... + 423611.

It is an arithmetic number, because the mean of its divisors is an integer number (760403700).

Almost surely, 2^11002001021 is an apocalyptic number.

11002001021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11002001021 is a deficient number, since it is larger than the sum of its proper divisors (1164458179).

11002001021 is a wasteful number, since it uses less digits than its factorization.

11002001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27340.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 11002001021 its reverse (12010020011), we get a palindrome (23012021032).

The spelling of 11002001021 in words is "eleven billion, two million, one thousand, twenty-one".