11103203231 has 4 divisors (see below), whose sum is σ = 11103426264. Its totient is φ = 11102980200.

The previous prime is 11103203213. The next prime is 11103203281. The reversal of 11103203231 is 13230230111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11103203231 - 2²² = 11099008927 is a prime.

It is a super-2 number, since 2×11103203231² (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 (11103203281) 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, 1001 + ... + 149021.

It is an arithmetic number, because the mean of its divisors is an integer number (2775856566).

Almost surely, 2^11103203231 is an apocalyptic number.

11103203231 is a deficient number, since it is larger than the sum of its proper divisors (223033).

11103203231 is an equidigital number, since it uses as much as digits as its factorization.

11103203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223032.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 11103203231 its reverse (13230230111), we get a palindrome (24333433342).

The spelling of 11103203231 in words is "eleven billion, one hundred three million, two hundred three thousand, two hundred thirty-one".