12312212113 has 2 divisors, whose sum is σ = 12312212114. Its totient is φ = 12312212112.

The previous prime is 12312212089. The next prime is 12312212119. The reversal of 12312212113 is 31121221321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10718046784 + 1594165329 = 103528^2 + 39927^2 .

It is an emirp because it is prime and its reverse (31121221321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12312212113 - 2²¹ = 12310114961 is a prime.

It is not a weakly prime, because it can be changed into another prime (12312212119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156106056 + 6156106057.

It is an arithmetic number, because the mean of its divisors is an integer number (6156106057).

Almost surely, 2^12312212113 is an apocalyptic number.

It is an amenable number.

12312212113 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312212113 is an equidigital number, since it uses as much as digits as its factorization.

12312212113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 19.

Adding to 12312212113 its reverse (31121221321), we get a palindrome (43433433434).

The spelling of 12312212113 in words is "twelve billion, three hundred twelve million, two hundred twelve thousand, one hundred thirteen".