12312033121 has 4 divisors (see below), whose sum is σ = 12356481172. Its totient is φ = 12267585072.

The previous prime is 12312033119. The next prime is 12312033133. The reversal of 12312033121 is 12133021321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12133021321 = 607 ⋅19988503.

It can be written as a sum of positive squares in 2 ways, for example, as 4690743121 + 7621290000 = 68489^2 + 87300^2 .

It is a cyclic number.

It is not a de Polignac number, because 12312033121 - 2¹ = 12312033119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12312033221) 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, 22223610 + ... + 22224163.

It is an arithmetic number, because the mean of its divisors is an integer number (3089120293).

Almost surely, 2^12312033121 is an apocalyptic number.

It is an amenable number.

12312033121 is a deficient number, since it is larger than the sum of its proper divisors (44448051).

12312033121 is an equidigital number, since it uses as much as digits as its factorization.

12312033121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44448050.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12312033121 its reverse (12133021321), we get a palindrome (24445054442).

The spelling of 12312033121 in words is "twelve billion, three hundred twelve million, thirty-three thousand, one hundred twenty-one".