312245312221 has 8 divisors (see below), whose sum is σ = 312466302720. Its totient is φ = 312024379872.

The previous prime is 312245312213. The next prime is 312245312263. The reversal of 312245312221 is 122213542213.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 312245312221 - 2³ = 312245312213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312245312221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312245312021) 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, 17916850 + ... + 17934268.

It is an arithmetic number, because the mean of its divisors is an integer number (39058287840).

Almost surely, 2^312245312221 is an apocalyptic number.

It is an amenable number.

312245312221 is a deficient number, since it is larger than the sum of its proper divisors (220990499).

312245312221 is a wasteful number, since it uses less digits than its factorization.

312245312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29075.

The product of its digits is 5760, while the sum is 28.

Adding to 312245312221 its reverse (122213542213), we get a palindrome (434458854434).

The spelling of 312245312221 in words is "three hundred twelve billion, two hundred forty-five million, three hundred twelve thousand, two hundred twenty-one".