11100000121 has 4 divisors (see below), whose sum is σ = 12685714432. Its totient is φ = 9514285812.

The previous prime is 11100000113. The next prime is 11100000157. The reversal of 11100000121 is 12100000111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12100000111 = 113 ⋅107079647.

It is a cyclic number.

It is not a de Polignac number, because 11100000121 - 2³ = 11100000113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 1585714303 = 11100000121 / (1 + 1 + 1 + 0 + 0 + 0 + 0 + 0 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11100000101) 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 3 ways as a sum of consecutive naturals, for example, 792857145 + ... + 792857158.

It is an arithmetic number, because the mean of its divisors is an integer number (3171428608).

Almost surely, 2^11100000121 is an apocalyptic number.

It is an amenable number.

11100000121 is a deficient number, since it is larger than the sum of its proper divisors (1585714311).

11100000121 is an equidigital number, since it uses as much as digits as its factorization.

11100000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585714310.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 11100000121 its reverse (12100000111), we get a palindrome (23200000232).

The spelling of 11100000121 in words is "eleven billion, one hundred million, one hundred twenty-one", and thus it is an aban number.