3213012320221 has 12 divisors (see below), whose sum is σ = 3555167396832. Its totient is φ = 2879780519000.

The previous prime is 3213012320209. The next prime is 3213012320249. The reversal of 3213012320221 is 1220232103123.

It is not a de Polignac number, because 3213012320221 - 2⁷ = 3213012320093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3213012320192 and 3213012320201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3213012320281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28916185 + ... + 29027086.

It is an arithmetic number, because the mean of its divisors is an integer number (296263949736).

Almost surely, 2^{3213012320221} is an apocalyptic number.

It is an amenable number.

3213012320221 is a deficient number, since it is larger than the sum of its proper divisors (342155076611).

3213012320221 is an equidigital number, since it uses as much as digits as its factorization.

3213012320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57943424 (or 57943353 counting only the distinct ones).

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

Adding to 3213012320221 its reverse (1220232103123), we get a palindrome (4433244423344).

The spelling of 3213012320221 in words is "three trillion, two hundred thirteen billion, twelve million, three hundred twenty thousand, two hundred twenty-one".