12121204331 has 2 divisors, whose sum is σ = 12121204332. Its totient is φ = 12121204330.

The previous prime is 12121204313. The next prime is 12121204343. The reversal of 12121204331 is 13340212121.

Together with previous prime (12121204313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12121204331 - 2¹⁸ = 12120942187 is a prime.

It is a super-2 number, since 2×12121204331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12121204301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060602165 + 6060602166.

It is an arithmetic number, because the mean of its divisors is an integer number (6060602166).

Almost surely, 2^12121204331 is an apocalyptic number.

12121204331 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121204331 is an equidigital number, since it uses as much as digits as its factorization.

12121204331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12121204331 its reverse (13340212121), we get a palindrome (25461416452).

The spelling of 12121204331 in words is "twelve billion, one hundred twenty-one million, two hundred four thousand, three hundred thirty-one".