11503313100 has 54 divisors (see below), whose sum is σ = 36056498660. Its totient is φ = 3067549920.

The previous prime is 11503313077. The next prime is 11503313113. The reversal of 11503313100 is 131330511.

It is a super-2 number, since 2×11503313100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6389830 + ... + 6391629.

Almost surely, 2^11503313100 is an apocalyptic number.

11503313100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11503313100 is an abundant number, since it is smaller than the sum of its proper divisors (24553185560).

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

11503313100 is a wasteful number, since it uses less digits than its factorization.

11503313100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12781479 (or 12781469 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

Adding to 11503313100 its reverse (131330511), we get a palindrome (11634643611).

The spelling of 11503313100 in words is "eleven billion, five hundred three million, three hundred thirteen thousand, one hundred".