11102020121 has 4 divisors (see below), whose sum is σ = 11584716672. Its totient is φ = 10619323572.

The previous prime is 11102020067. The next prime is 11102020129. The reversal of 11102020121 is 12102020111.

11102020121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 12102020111 = 421 ⋅28745891.

It is a cyclic number.

It is not a de Polignac number, because 11102020121 - 2³⁰ = 10028278297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11102020129) 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 3 ways as a sum of consecutive naturals, for example, 241348241 + ... + 241348286.

It is an arithmetic number, because the mean of its divisors is an integer number (2896179168).

Almost surely, 2^11102020121 is an apocalyptic number.

It is an amenable number.

11102020121 is a deficient number, since it is larger than the sum of its proper divisors (482696551).

11102020121 is an equidigital number, since it uses as much as digits as its factorization.

11102020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482696550.

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

Adding to 11102020121 its reverse (12102020111), we get a palindrome (23204040232).

The spelling of 11102020121 in words is "eleven billion, one hundred two million, twenty thousand, one hundred twenty-one".