11002221220121 has 8 divisors (see below), whose sum is σ = 11051352302280. Its totient is φ = 10953099585792.

The previous prime is 11002221220103. The next prime is 11002221220141. The reversal of 11002221220121 is 12102212220011.

It can be written as a sum of positive squares in 4 ways, for example, as 1918748565721 + 9083472654400 = 1385189^2 + 3013880^2 .

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 11002221220121 - 2¹⁴ = 11002221203737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11002221220121.

It is not an unprimeable number, because it can be changed into a prime (11002221220141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22550 + ... + 4690943.

It is an arithmetic number, because the mean of its divisors is an integer number (1381419037785).

Almost surely, 2^{11002221220121} is an apocalyptic number.

It is an amenable number.

11002221220121 is a deficient number, since it is larger than the sum of its proper divisors (49131082159).

11002221220121 is a wasteful number, since it uses less digits than its factorization.

11002221220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723915.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11002221220121 its reverse (12102212220011), we get a palindrome (23104433440132).

The spelling of 11002221220121 in words is "eleven trillion, two billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty-one".