12120111233 has 4 divisors (see below), whose sum is σ = 12286140228. Its totient is φ = 11954082240.

The previous prime is 12120111197. The next prime is 12120111239. The reversal of 12120111233 is 33211102121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4712410609 + 7407700624 = 68647^2 + 86068^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120111233 - 2¹⁰ = 12120110209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120111239) 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, 83014388 + ... + 83014533.

It is an arithmetic number, because the mean of its divisors is an integer number (3071535057).

Almost surely, 2^12120111233 is an apocalyptic number.

It is an amenable number.

12120111233 is a deficient number, since it is larger than the sum of its proper divisors (166028995).

12120111233 is an equidigital number, since it uses as much as digits as its factorization.

12120111233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166028994.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12120111233 its reverse (33211102121), we get a palindrome (45331213354).

The spelling of 12120111233 in words is "twelve billion, one hundred twenty million, one hundred eleven thousand, two hundred thirty-three".