1312121299 has 2 divisors, whose sum is σ = 1312121300. Its totient is φ = 1312121298.

The previous prime is 1312121297. The next prime is 1312121303. The reversal of 1312121299 is 9921212131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312121299 - 2¹ = 1312121297 is a prime.

It is a super-3 number, since 3×1312121299³ (a number of 28 digits) contains 333 as substring.

Together with 1312121297, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1312121299.

It is not a weakly prime, because it can be changed into another prime (1312121297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656060649 + 656060650.

It is an arithmetic number, because the mean of its divisors is an integer number (656060650).

Almost surely, 2^1312121299 is an apocalyptic number.

1312121299 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312121299 is an equidigital number, since it uses as much as digits as its factorization.

1312121299 is an evil number, because the sum of its binary digits is even.

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

The square root of 1312121299 is about 36223.2149180605. The cubic root of 1312121299 is about 1094.7744714598.

The spelling of 1312121299 in words is "one billion, three hundred twelve million, one hundred twenty-one thousand, two hundred ninety-nine".