1312030323221 has 4 divisors (see below), whose sum is σ = 1312042996992. Its totient is φ = 1312017649452.

The previous prime is 1312030323209. The next prime is 1312030323223. The reversal of 1312030323221 is 1223230302131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312030323221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312030323223) 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, 6180311 + ... + 6389076.

It is an arithmetic number, because the mean of its divisors is an integer number (328010749248).

Almost surely, 2^{1312030323221} is an apocalyptic number.

It is an amenable number.

1312030323221 is a deficient number, since it is larger than the sum of its proper divisors (12673771).

1312030323221 is a wasteful number, since it uses less digits than its factorization.

1312030323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12673770.

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

Adding to 1312030323221 its reverse (1223230302131), we get a palindrome (2535260625352).

The spelling of 1312030323221 in words is "one trillion, three hundred twelve billion, thirty million, three hundred twenty-three thousand, two hundred twenty-one".