11102120121 has 4 divisors (see below), whose sum is σ = 14802826832. Its totient is φ = 7401413412.

The previous prime is 11102120059. The next prime is 11102120129. The reversal of 11102120121 is 12102120111.

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: 12102120111 = 3 ⋅4034040037.

It is not a de Polignac number, because 11102120121 - 2²⁵ = 11068565689 is a prime.

It is a super-2 number, since 2×11102120121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11102120097 and 11102120106.

It is not an unprimeable number, because it can be changed into a prime (11102120129) 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, 1850353351 + ... + 1850353356.

It is an arithmetic number, because the mean of its divisors is an integer number (3700706708).

Almost surely, 2^11102120121 is an apocalyptic number.

It is an amenable number.

11102120121 is a deficient number, since it is larger than the sum of its proper divisors (3700706711).

11102120121 is an equidigital number, since it uses as much as digits as its factorization.

11102120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700706710.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11102120121 its reverse (12102120111), we get a palindrome (23204240232).

The spelling of 11102120121 in words is "eleven billion, one hundred two million, one hundred twenty thousand, one hundred twenty-one".