321313112332221 has 16 divisors (see below), whose sum is σ = 442238039198208. Its totient is φ = 207298483425600.

The previous prime is 321313112332213. The next prime is 321313112332229. The reversal of 321313112332221 is 122233211313123.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (321313112332213) and next prime (321313112332229).

It is not a de Polignac number, because 321313112332221 - 2³ = 321313112332213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321313112332229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75440731 + ... + 79585991.

It is an arithmetic number, because the mean of its divisors is an integer number (27639877449888).

Almost surely, 2^{321313112332221} is an apocalyptic number.

321313112332221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

321313112332221 is a deficient number, since it is larger than the sum of its proper divisors (120924926865987).

321313112332221 is a wasteful number, since it uses less digits than its factorization.

321313112332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978772.

The product of its digits is 7776, while the sum is 30.

Adding to 321313112332221 its reverse (122233211313123), we get a palindrome (443546323645344).

The spelling of 321313112332221 in words is "three hundred twenty-one trillion, three hundred thirteen billion, one hundred twelve million, three hundred thirty-two thousand, two hundred twenty-one".