1212311299 has 2 divisors, whose sum is σ = 1212311300. Its totient is φ = 1212311298.

The previous prime is 1212311281. The next prime is 1212311311. The reversal of 1212311299 is 9921132121.

It is a strong prime.

It is an emirp because it is prime and its reverse (9921132121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212311299 - 2⁵ = 1212311267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212311299.

It is not a weakly prime, because it can be changed into another prime (1212011299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606155649 + 606155650.

It is an arithmetic number, because the mean of its divisors is an integer number (606155650).

Almost surely, 2^1212311299 is an apocalyptic number.

1212311299 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212311299 is an equidigital number, since it uses as much as digits as its factorization.

1212311299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 31.

The square root of 1212311299 is about 34818.2609990792. The cubic root of 1212311299 is about 1066.2802970555.

The spelling of 1212311299 in words is "one billion, two hundred twelve million, three hundred eleven thousand, two hundred ninety-nine".