3212120221 has 16 divisors (see below), whose sum is σ = 3412022400. Its totient is φ = 3015387648.

The previous prime is 3212120189. The next prime is 3212120227. The reversal of 3212120221 is 1220212123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3212120221 - 2⁵ = 3212120189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3212120195 and 3212120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3212120227) 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, 2625816 + ... + 2627038.

It is an arithmetic number, because the mean of its divisors is an integer number (213251400).

Almost surely, 2^3212120221 is an apocalyptic number.

It is an amenable number.

3212120221 is a deficient number, since it is larger than the sum of its proper divisors (199902179).

3212120221 is a wasteful number, since it uses less digits than its factorization.

3212120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 3212120221 is about 56675.5698780348. The cubic root of 3212120221 is about 1475.4707253309.

Adding to 3212120221 its reverse (1220212123), we get a palindrome (4432332344).

The spelling of 3212120221 in words is "three billion, two hundred twelve million, one hundred twenty thousand, two hundred twenty-one".