11002211222121 has 16 divisors (see below), whose sum is σ = 18628082492800. Its totient is φ = 6286977841104.

The previous prime is 11002211222087. The next prime is 11002211222147. The reversal of 11002211222121 is 12122211220011.

11002211222121 is a `hidden beast` number, since 1 + 100 + 221 + 1 + 222 + 121 = 666.

It is not a de Polignac number, because 11002211222121 - 2⁹ = 11002211221609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11002211222094 and 11002211222103.

It is not an unprimeable number, because it can be changed into a prime (11002211222521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29106378706 + ... + 29106379083.

It is an arithmetic number, because the mean of its divisors is an integer number (1164255155800).

Almost surely, 2^{11002211222121} is an apocalyptic number.

It is an amenable number.

11002211222121 is a deficient number, since it is larger than the sum of its proper divisors (7625871270679).

11002211222121 is an equidigital number, since it uses as much as digits as its factorization.

11002211222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58212757805 (or 58212757799 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11002211222121 its reverse (12122211220011), we get a palindrome (23124422442132).

The spelling of 11002211222121 in words is "eleven trillion, two billion, two hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".