1312230101321 has 4 divisors (see below), whose sum is σ = 1324268909700. Its totient is φ = 1300191292944.

The previous prime is 1312230101311. The next prime is 1312230101333. The reversal of 1312230101321 is 1231010322131.

It is a happy number.

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 563304287296 + 748925814025 = 750536^2 + 865405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312230101321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312230101293 and 1312230101302.

It is not an unprimeable number, because it can be changed into a prime (1312230101311) 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, 6019404026 + ... + 6019404243.

It is an arithmetic number, because the mean of its divisors is an integer number (331067227425).

Almost surely, 2^{1312230101321} is an apocalyptic number.

It is an amenable number.

1312230101321 is a deficient number, since it is larger than the sum of its proper divisors (12038808379).

1312230101321 is a wasteful number, since it uses less digits than its factorization.

1312230101321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12038808378.

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

Adding to 1312230101321 its reverse (1231010322131), we get a palindrome (2543240423452).

The spelling of 1312230101321 in words is "one trillion, three hundred twelve billion, two hundred thirty million, one hundred one thousand, three hundred twenty-one".