11123135541 has 40 divisors (see below), whose sum is σ = 19000802304. Its totient is φ = 6352382880.

The previous prime is 11123135537. The next prime is 11123135557. The reversal of 11123135541 is 14553132111.

11123135541 is a `hidden beast` number, since 1 + 112 + 3 + 1 + 3 + 5 + 541 = 666.

It is not a de Polignac number, because 11123135541 - 2² = 11123135537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123135561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1192291 + ... + 1201583.

Almost surely, 2^11123135541 is an apocalyptic number.

It is an amenable number.

11123135541 is a deficient number, since it is larger than the sum of its proper divisors (7877666763).

11123135541 is an equidigital number, since it uses as much as digits as its factorization.

11123135541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11423 (or 11414 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

Adding to 11123135541 its reverse (14553132111), we get a palindrome (25676267652).

The spelling of 11123135541 in words is "eleven billion, one hundred twenty-three million, one hundred thirty-five thousand, five hundred forty-one".