11011103231 has 24 divisors (see below), whose sum is σ = 11827910304. Its totient is φ = 10247086080.

The previous prime is 11011103219. The next prime is 11011103239. The reversal of 11011103231 is 13230111011.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-11011103231 is a prime.

It is a super-2 number, since 2×11011103231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011103239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9047135 + ... + 9048351.

It is an arithmetic number, because the mean of its divisors is an integer number (492829596).

Almost surely, 2^11011103231 is an apocalyptic number.

11011103231 is a deficient number, since it is larger than the sum of its proper divisors (816807073).

11011103231 is a wasteful number, since it uses less digits than its factorization.

11011103231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 11011103231 its reverse (13230111011), we get a palindrome (24241214242).

The spelling of 11011103231 in words is "eleven billion, eleven million, one hundred three thousand, two hundred thirty-one".