11203123240 has 32 divisors (see below), whose sum is σ = 25211894760. Its totient is φ = 4480384000.

The previous prime is 11203123231. The next prime is 11203123249. The reversal of 11203123240 is 4232130211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11203123231) and next prime (11203123249).

It can be written as a sum of positive squares in 4 ways, for example, as 10878907204 + 324216036 = 104302^2 + 18006^2 .

It is not an unprimeable number, because it can be changed into a prime (11203123249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207900 + ... + 256180.

Almost surely, 2^11203123240 is an apocalyptic number.

11203123240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11203123240 is an abundant number, since it is smaller than the sum of its proper divisors (14008771520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11203123240 is a wasteful number, since it uses less digits than its factorization.

11203123240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54093 (or 54089 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 11203123240 its reverse (4232130211), we get a palindrome (15435253451).

The spelling of 11203123240 in words is "eleven billion, two hundred three million, one hundred twenty-three thousand, two hundred forty".