12121012331 has 2 divisors, whose sum is σ = 12121012332. Its totient is φ = 12121012330.

The previous prime is 12121012303. The next prime is 12121012363. The reversal of 12121012331 is 13321012121.

It is a weak prime.

It is an emirp because it is prime and its reverse (13321012121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12121012331 - 2¹⁰ = 12121011307 is a prime.

It is a super-2 number, since 2×12121012331² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12121012831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060506165 + 6060506166.

It is an arithmetic number, because the mean of its divisors is an integer number (6060506166).

Almost surely, 2^12121012331 is an apocalyptic number.

12121012331 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121012331 is an equidigital number, since it uses as much as digits as its factorization.

12121012331 is an odious number, because the sum of its binary digits is odd.

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

Adding to 12121012331 its reverse (13321012121), we get a palindrome (25442024452).

The spelling of 12121012331 in words is "twelve billion, one hundred twenty-one million, twelve thousand, three hundred thirty-one".