11100101020121 has 4 divisors (see below), whose sum is σ = 11143292074932. Its totient is φ = 11056909965312.

The previous prime is 11100101020117. The next prime is 11100101020187. The reversal of 11100101020121 is 12102010100111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9710203854400 + 1389897165721 = 3116120^2 + 1178939^2 .

It is a cyclic number.

It is not a de Polignac number, because 11100101020121 - 2² = 11100101020117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11100101020111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21595527020 + ... + 21595527533.

It is an arithmetic number, because the mean of its divisors is an integer number (2785823018733).

Almost surely, 2^{11100101020121} is an apocalyptic number.

It is an amenable number.

11100101020121 is a deficient number, since it is larger than the sum of its proper divisors (43191054811).

11100101020121 is an equidigital number, since it uses as much as digits as its factorization.

11100101020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43191054810.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11100101020121 its reverse (12102010100111), we get a palindrome (23202111120232).

The spelling of 11100101020121 in words is "eleven trillion, one hundred billion, one hundred one million, twenty thousand, one hundred twenty-one".