312320313002221 has 4 divisors (see below), whose sum is σ = 312369801253344. Its totient is φ = 312270824751100.

The previous prime is 312320313002167. The next prime is 312320313002273. The reversal of 312320313002221 is 122200313023213.

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 not a de Polignac number, because 312320313002221 - 2³⁵ = 312285953263853 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 (312320313002281) 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, 24744116095 + ... + 24744128716.

It is an arithmetic number, because the mean of its divisors is an integer number (78092450313336).

Almost surely, 2^{312320313002221} is an apocalyptic number.

It is an amenable number.

312320313002221 is a deficient number, since it is larger than the sum of its proper divisors (49488251123).

312320313002221 is an equidigital number, since it uses as much as digits as its factorization.

312320313002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49488251122.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 312320313002221 its reverse (122200313023213), we get a palindrome (434520626025434).

The spelling of 312320313002221 in words is "three hundred twelve trillion, three hundred twenty billion, three hundred thirteen million, two thousand, two hundred twenty-one".