11125305511 has 4 divisors (see below), whose sum is σ = 11141739432. Its totient is φ = 11108871592.

The previous prime is 11125305509. The next prime is 11125305533. The reversal of 11125305511 is 11550352111.

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 11125305511 - 2¹ = 11125305509 is a prime.

It is a super-2 number, since 2×11125305511² (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 (11125305571) 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, 8215945 + ... + 8217298.

It is an arithmetic number, because the mean of its divisors is an integer number (2785434858).

Almost surely, 2^11125305511 is an apocalyptic number.

11125305511 is a deficient number, since it is larger than the sum of its proper divisors (16433921).

11125305511 is an equidigital number, since it uses as much as digits as its factorization.

11125305511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16433920.

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 11125305511 its reverse (11550352111), we get a palindrome (22675657622).

The spelling of 11125305511 in words is "eleven billion, one hundred twenty-five million, three hundred five thousand, five hundred eleven".