1312323210221 has 8 divisors (see below), whose sum is σ = 1330345023744. Its totient is φ = 1294302607200.

The previous prime is 1312323210169. The next prime is 1312323210251. The reversal of 1312323210221 is 1220123232131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312323210221 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 (1312323210251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1999946 + ... + 2573796.

It is an arithmetic number, because the mean of its divisors is an integer number (166293127968).

Almost surely, 2^{1312323210221} is an apocalyptic number.

It is an amenable number.

1312323210221 is a deficient number, since it is larger than the sum of its proper divisors (18021813523).

1312323210221 is an equidigital number, since it uses as much as digits as its factorization.

1312323210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605251.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1312323210221 its reverse (1220123232131), we get a palindrome (2532446442352).

The spelling of 1312323210221 in words is "one trillion, three hundred twelve billion, three hundred twenty-three million, two hundred ten thousand, two hundred twenty-one".