11101121021 has 4 divisors (see below), whose sum is σ = 11108731200. Its totient is φ = 11093510844.

The previous prime is 11101120997. The next prime is 11101121029. The reversal of 11101121021 is 12012110111.

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 11101121021 - 2⁶ = 11101120957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101120993 and 11101121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101121029) 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, 3802901 + ... + 3805818.

It is an arithmetic number, because the mean of its divisors is an integer number (2777182800).

Almost surely, 2^11101121021 is an apocalyptic number.

It is an amenable number.

11101121021 is a deficient number, since it is larger than the sum of its proper divisors (7610179).

11101121021 is an equidigital number, since it uses as much as digits as its factorization.

11101121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7610178.

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

Adding to 11101121021 its reverse (12012110111), we get a palindrome (23113231132).

The spelling of 11101121021 in words is "eleven billion, one hundred one million, one hundred twenty-one thousand, twenty-one".