11002121021 has 8 divisors (see below), whose sum is σ = 11179036800. Its totient is φ = 10825815280.

The previous prime is 11002121003. The next prime is 11002121023. The reversal of 11002121021 is 12012120011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11002121021 - 2²² = 10997926717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11002120993 and 11002121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11002121023) 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, 116081 + ... + 188358.

It is an arithmetic number, because the mean of its divisors is an integer number (1397379600).

Almost surely, 2^11002121021 is an apocalyptic number.

It is an amenable number.

11002121021 is a deficient number, since it is larger than the sum of its proper divisors (176915779).

11002121021 is an equidigital number, since it uses as much as digits as its factorization.

11002121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305019.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11002121021 its reverse (12012120011), we get a palindrome (23014241032).

The spelling of 11002121021 in words is "eleven billion, two million, one hundred twenty-one thousand, twenty-one".