11543321121 has 8 divisors (see below), whose sum is σ = 16060272960. Its totient is φ = 7360958352.

The previous prime is 11543321099. The next prime is 11543321143. The reversal of 11543321121 is 12112334511.

It is an interprime number because it is at equal distance from previous prime (11543321099) and next prime (11543321143).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11543321121 - 2¹³ = 11543312929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11543321091 and 11543321100.

It is not an unprimeable number, because it can be changed into a prime (11543325121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83647186 + ... + 83647323.

It is an arithmetic number, because the mean of its divisors is an integer number (2007534120).

Almost surely, 2^11543321121 is an apocalyptic number.

It is an amenable number.

11543321121 is a deficient number, since it is larger than the sum of its proper divisors (4516951839).

11543321121 is a wasteful number, since it uses less digits than its factorization.

11543321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167294535.

The product of its digits is 720, while the sum is 24.

Adding to 11543321121 its reverse (12112334511), we get a palindrome (23655655632).

The spelling of 11543321121 in words is "eleven billion, five hundred forty-three million, three hundred twenty-one thousand, one hundred twenty-one".