3221312320231 has 4 divisors (see below), whose sum is σ = 3221330146200. Its totient is φ = 3221294494264.

The previous prime is 3221312320229. The next prime is 3221312320241. The reversal of 3221312320231 is 1320232131223.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3221312320231 - 2¹ = 3221312320229 is a prime.

It is a super-2 number, since 2×3221312320231² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3221312320196 and 3221312320205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221312320241) 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, 8639116 + ... + 9004273.

It is an arithmetic number, because the mean of its divisors is an integer number (805332536550).

Almost surely, 2^{3221312320231} is an apocalyptic number.

3221312320231 is a deficient number, since it is larger than the sum of its proper divisors (17825969).

3221312320231 is a wasteful number, since it uses less digits than its factorization.

3221312320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17825968.

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

Adding to 3221312320231 its reverse (1320232131223), we get a palindrome (4541544451454).

The spelling of 3221312320231 in words is "three trillion, two hundred twenty-one billion, three hundred twelve million, three hundred twenty thousand, two hundred thirty-one".