11002100000121 has 24 divisors (see below), whose sum is σ = 16139502244320. Its totient is φ = 7220606633856.

The previous prime is 11002100000107. The next prime is 11002100000179. The reversal of 11002100000121 is 12100000120011.

It is a happy number.

It is not a de Polignac number, because 11002100000121 - 2²⁶ = 11002032891257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (11002100000191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4937851 + ... + 6810768.

It is an arithmetic number, because the mean of its divisors is an integer number (672479260180).

Almost surely, 2^{11002100000121} is an apocalyptic number.

It is an amenable number.

11002100000121 is a deficient number, since it is larger than the sum of its proper divisors (5137402244199).

11002100000121 is a wasteful number, since it uses less digits than its factorization.

11002100000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11750245 (or 11750242 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11002100000121 its reverse (12100000120011), we get a palindrome (23102100120132).

The spelling of 11002100000121 in words is "eleven trillion, two billion, one hundred million, one hundred twenty-one", and thus it is an aban number.