1212230320313 has 4 divisors (see below), whose sum is σ = 1215346594020. Its totient is φ = 1209114046608.

The previous prime is 1212230320291. The next prime is 1212230320349. The reversal of 1212230320313 is 3130230322121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 487702499449 + 724527820864 = 698357^2 + 851192^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212230320313 - 2³⁴ = 1195050451129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1212230320393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1558136270 + ... + 1558137047.

It is an arithmetic number, because the mean of its divisors is an integer number (303836648505).

Almost surely, 2^{1212230320313} is an apocalyptic number.

It is an amenable number.

1212230320313 is a deficient number, since it is larger than the sum of its proper divisors (3116273707).

1212230320313 is an equidigital number, since it uses as much as digits as its factorization.

1212230320313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116273706.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1212230320313 its reverse (3130230322121), we get a palindrome (4342460642434).

The spelling of 1212230320313 in words is "one trillion, two hundred twelve billion, two hundred thirty million, three hundred twenty thousand, three hundred thirteen".