11503055051 has 4 divisors (see below), whose sum is σ = 11529621432. Its totient is φ = 11476488672.

The previous prime is 11503055041. The next prime is 11503055071. The reversal of 11503055051 is 15055030511.

11503055051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11503055051 - 2²⁶ = 11435946187 is a prime.

It is a super-2 number, since 2×11503055051² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11503055051.

It is not an unprimeable number, because it can be changed into a prime (11503055041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13282541 + ... + 13283406.

It is an arithmetic number, because the mean of its divisors is an integer number (2882405358).

Almost surely, 2^11503055051 is an apocalyptic number.

11503055051 is a deficient number, since it is larger than the sum of its proper divisors (26566381).

11503055051 is an equidigital number, since it uses as much as digits as its factorization.

11503055051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26566380.

The product of its (nonzero) digits is 1875, while the sum is 26.

Adding to 11503055051 its reverse (15055030511), we get a palindrome (26558085562).

The spelling of 11503055051 in words is "eleven billion, five hundred three million, fifty-five thousand, fifty-one".