11123421103 has 4 divisors (see below), whose sum is σ = 11124514368. Its totient is φ = 11122327840.

The previous prime is 11123421091. The next prime is 11123421107. The reversal of 11123421103 is 30112432111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30112432111 = 140759 ⋅213929.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11123421103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123421107) 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, 531226 + ... + 551767.

It is an arithmetic number, because the mean of its divisors is an integer number (2781128592).

Almost surely, 2^11123421103 is an apocalyptic number.

11123421103 is a deficient number, since it is larger than the sum of its proper divisors (1093265).

11123421103 is a wasteful number, since it uses less digits than its factorization.

11123421103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093264.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11123421103 its reverse (30112432111), we get a palindrome (41235853214).

The spelling of 11123421103 in words is "eleven billion, one hundred twenty-three million, four hundred twenty-one thousand, one hundred three".