11121111103 has 4 divisors (see below), whose sum is σ = 11706432760. Its totient is φ = 10535789448.

The previous prime is 11121111101. The next prime is 11121111107. The reversal of 11121111103 is 30111112111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30111112111 = 157 ⋅191790523.

It is a cyclic number.

It is not a de Polignac number, because 11121111103 - 2¹ = 11121111101 is a prime.

It is a super-2 number, since 2×11121111103² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121111101) 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, 292660800 + ... + 292660837.

It is an arithmetic number, because the mean of its divisors is an integer number (2926608190).

Almost surely, 2^11121111103 is an apocalyptic number.

11121111103 is a deficient number, since it is larger than the sum of its proper divisors (585321657).

11121111103 is an equidigital number, since it uses as much as digits as its factorization.

11121111103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585321656.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 11121111103 its reverse (30111112111), we get a palindrome (41232223214).

The spelling of 11121111103 in words is "eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred three".