3312120221 has 32 divisors (see below), whose sum is σ = 3605741568. Its totient is φ = 3034785600.

The previous prime is 3312120187. The next prime is 3312120239. The reversal of 3312120221 is 1220212133.

It is not a de Polignac number, because 3312120221 - 2²² = 3307925917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3312120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3312120241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16812695 + ... + 16812891.

It is an arithmetic number, because the mean of its divisors is an integer number (112679424).

Almost surely, 2^3312120221 is an apocalyptic number.

It is an amenable number.

3312120221 is a deficient number, since it is larger than the sum of its proper divisors (293621347).

3312120221 is a wasteful number, since it uses less digits than its factorization.

3312120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3312120221 is about 57551.0227624149. The cubic root of 3312120221 is about 1490.6260181924.

Adding to 3312120221 its reverse (1220212133), we get a palindrome (4532332354).

The spelling of 3312120221 in words is "three billion, three hundred twelve million, one hundred twenty thousand, two hundred twenty-one".