11002100001221 has 16 divisors (see below), whose sum is σ = 13314098931840. Its totient is φ = 8875221442560.

The previous prime is 11002100001209. The next prime is 11002100001251. The reversal of 11002100001221 is 12210000120011.

It is a cyclic number.

It is not a de Polignac number, because 11002100001221 - 2³⁴ = 10984920132037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11002100001251) 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, 324710 + ... + 4702088.

It is an arithmetic number, because the mean of its divisors is an integer number (832131183240).

Almost surely, 2^{11002100001221} is an apocalyptic number.

It is an amenable number.

11002100001221 is a deficient number, since it is larger than the sum of its proper divisors (2311998930619).

11002100001221 is a wasteful number, since it uses less digits than its factorization.

11002100001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398524.

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

Adding to 11002100001221 its reverse (12210000120011), we get a palindrome (23212100121232).

The spelling of 11002100001221 in words is "eleven trillion, two billion, one hundred million, one thousand, two hundred twenty-one".