12033121111 has 4 divisors (see below), whose sum is σ = 13127041224. Its totient is φ = 10939201000.

The previous prime is 12033121103. The next prime is 12033121181. The reversal of 12033121111 is 11112133021.

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: 11112133021 = 11 ⋅1010193911.

It is a cyclic number.

It is not a de Polignac number, because 12033121111 - 2³ = 12033121103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12033121181) 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, 546960040 + ... + 546960061.

It is an arithmetic number, because the mean of its divisors is an integer number (3281760306).

Almost surely, 2^12033121111 is an apocalyptic number.

12033121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12033121111 is a deficient number, since it is larger than the sum of its proper divisors (1093920113).

12033121111 is a wasteful number, since it uses less digits than its factorization.

12033121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093920112.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12033121111 its reverse (11112133021), we get a palindrome (23145254132).

The spelling of 12033121111 in words is "twelve billion, thirty-three million, one hundred twenty-one thousand, one hundred eleven".