11101102120021 has 4 divisors (see below), whose sum is σ = 11123896991392. Its totient is φ = 11078307248652.

The previous prime is 11101102120007. The next prime is 11101102120153. The reversal of 11101102120021 is 12002120110111.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 11101102120021 - 2¹³ = 11101102111829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101102119983 and 11101102120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101102120001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11397434955 + ... + 11397435928.

It is an arithmetic number, because the mean of its divisors is an integer number (2780974247848).

Almost surely, 2^{11101102120021} is an apocalyptic number.

It is an amenable number.

11101102120021 is a deficient number, since it is larger than the sum of its proper divisors (22794871371).

11101102120021 is an equidigital number, since it uses as much as digits as its factorization.

11101102120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22794871370.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11101102120021 its reverse (12002120110111), we get a palindrome (23103222230132).

The spelling of 11101102120021 in words is "eleven trillion, one hundred one billion, one hundred two million, one hundred twenty thousand, twenty-one".