11002221021 has 16 divisors (see below), whose sum is σ = 16099066368. Its totient is φ = 6628081200.

The previous prime is 11002221001. The next prime is 11002221079. The reversal of 11002221021 is 12012220011.

It is not a de Polignac number, because 11002221021 - 2¹⁰ = 11002219997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11002220988 and 11002221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11002221001) 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, 992695 + ... + 1003716.

It is an arithmetic number, because the mean of its divisors is an integer number (1006191648).

Almost surely, 2^11002221021 is an apocalyptic number.

11002221021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11002221021 is a deficient number, since it is larger than the sum of its proper divisors (5096845347).

11002221021 is a wasteful number, since it uses less digits than its factorization.

11002221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996592.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11002221021 its reverse (12012220011), we get a palindrome (23014441032).

The spelling of 11002221021 in words is "eleven billion, two million, two hundred twenty-one thousand, twenty-one".