12043011121 has 4 divisors (see below), whose sum is σ = 12043590244. Its totient is φ = 12042432000.

The previous prime is 12043011107. The next prime is 12043011131. The reversal of 12043011121 is 12111034021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12111034021 = 173 ⋅70005977.

It can be written as a sum of positive squares in 2 ways, for example, as 5430068721 + 6612942400 = 73689^2 + 81320^2 .

It is a cyclic number.

It is not a de Polignac number, because 12043011121 - 2¹¹ = 12043009073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12043011095 and 12043011104.

It is not an unprimeable number, because it can be changed into a prime (12043011131) 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, 257160 + ... + 300361.

It is an arithmetic number, because the mean of its divisors is an integer number (3010897561).

Almost surely, 2^12043011121 is an apocalyptic number.

It is an amenable number.

12043011121 is a deficient number, since it is larger than the sum of its proper divisors (579123).

12043011121 is an equidigital number, since it uses as much as digits as its factorization.

12043011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579122.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12043011121 its reverse (12111034021), we get a palindrome (24154045142).

The spelling of 12043011121 in words is "twelve billion, forty-three million, eleven thousand, one hundred twenty-one".