312302321221 has 8 divisors (see below), whose sum is σ = 340699313088. Its totient is φ = 283906308000.

The previous prime is 312302321183. The next prime is 312302321251. The reversal of 312302321221 is 122123203213.

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 312302321221 - 2⁹ = 312302320709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312302321192 and 312302321201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312302321251) 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, 528961 + ... + 951001.

It is an arithmetic number, because the mean of its divisors is an integer number (42587414136).

Almost surely, 2^312302321221 is an apocalyptic number.

It is an amenable number.

312302321221 is a deficient number, since it is larger than the sum of its proper divisors (28396991867).

312302321221 is a wasteful number, since it uses less digits than its factorization.

312302321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489323.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 312302321221 its reverse (122123203213), we get a palindrome (434425524434).

The spelling of 312302321221 in words is "three hundred twelve billion, three hundred two million, three hundred twenty-one thousand, two hundred twenty-one".