11124512291 has 4 divisors (see below), whose sum is σ = 11125934232. Its totient is φ = 11123090352.

The previous prime is 11124512279. The next prime is 11124512339. The reversal of 11124512291 is 19221542111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19221542111 = 12373 ⋅1553507.

It is a cyclic number.

It is not a de Polignac number, because 11124512291 - 2³⁰ = 10050770467 is a prime.

It is a super-2 number, since 2×11124512291² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11124512251) 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, 699170 + ... + 714903.

It is an arithmetic number, because the mean of its divisors is an integer number (2781483558).

Almost surely, 2^11124512291 is an apocalyptic number.

11124512291 is a deficient number, since it is larger than the sum of its proper divisors (1421941).

11124512291 is an equidigital number, since it uses as much as digits as its factorization.

11124512291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421940.

The product of its digits is 1440, while the sum is 29.

The spelling of 11124512291 in words is "eleven billion, one hundred twenty-four million, five hundred twelve thousand, two hundred ninety-one".