11103104021 has 4 divisors (see below), whose sum is σ = 11104548672. Its totient is φ = 11101659372.

The previous prime is 11103104009. The next prime is 11103104063. The reversal of 11103104021 is 12040130111.

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 a de Polignac number, because none of the positive numbers 2^k-11103104021 is a prime.

It is a super-2 number, since 2×11103104021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11103103987 and 11103104005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11103104071) 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, 710735 + ... + 726188.

It is an arithmetic number, because the mean of its divisors is an integer number (2776137168).

Almost surely, 2^11103104021 is an apocalyptic number.

It is an amenable number.

11103104021 is a deficient number, since it is larger than the sum of its proper divisors (1444651).

11103104021 is an equidigital number, since it uses as much as digits as its factorization.

11103104021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444650.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11103104021 its reverse (12040130111), we get a palindrome (23143234132).

The spelling of 11103104021 in words is "eleven billion, one hundred three million, one hundred four thousand, twenty-one".