11124135551 has 4 divisors (see below), whose sum is σ = 11163723504. Its totient is φ = 11084547600.

The previous prime is 11124135509. The next prime is 11124135557. The reversal of 11124135551 is 15553142111.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11124135551 is a prime.

It is a super-4 number, since 4×11124135551⁴ (a number of 41 digits) contains 4444 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 (11124135557) 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, 19793555 + ... + 19794116.

It is an arithmetic number, because the mean of its divisors is an integer number (2790930876).

Almost surely, 2^11124135551 is an apocalyptic number.

11124135551 is a deficient number, since it is larger than the sum of its proper divisors (39587953).

11124135551 is an equidigital number, since it uses as much as digits as its factorization.

11124135551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39587952.

The product of its digits is 3000, while the sum is 29.

Adding to 11124135551 its reverse (15553142111), we get a palindrome (26677277662).

The spelling of 11124135551 in words is "eleven billion, one hundred twenty-four million, one hundred thirty-five thousand, five hundred fifty-one".