1200312121313 has 2 divisors, whose sum is σ = 1200312121314. Its totient is φ = 1200312121312.

The previous prime is 1200312121303. The next prime is 1200312121339. The reversal of 1200312121313 is 3131212130021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1197958707169 + 2353414144 = 1094513^2 + 48512^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200312121313 - 2¹² = 1200312117217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200312121303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600156060656 + 600156060657.

It is an arithmetic number, because the mean of its divisors is an integer number (600156060657).

Almost surely, 2^{1200312121313} is an apocalyptic number.

It is an amenable number.

1200312121313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200312121313 is an equidigital number, since it uses as much as digits as its factorization.

1200312121313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1200312121313 its reverse (3131212130021), we get a palindrome (4331524251334).

The spelling of 1200312121313 in words is "one trillion, two hundred billion, three hundred twelve million, one hundred twenty-one thousand, three hundred thirteen".