3221221012 has 24 divisors (see below), whose sum is σ = 5936595840. Its totient is φ = 1525129920.

The previous prime is 3221220997. The next prime is 3221221019. The reversal of 3221221012 is 2101221223.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3221221019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177312 + ... + 194632.

It is an arithmetic number, because the mean of its divisors is an integer number (247358160).

Almost surely, 2^3221221012 is an apocalyptic number.

It is an amenable number.

3221221012 is a deficient number, since it is larger than the sum of its proper divisors (2715374828).

3221221012 is a wasteful number, since it uses less digits than its factorization.

3221221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19791 (or 19789 counting only the distinct ones).

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

The square root of 3221221012 is about 56755.8015712931. The cubic root of 3221221012 is about 1476.8628783893.

Adding to 3221221012 its reverse (2101221223), we get a palindrome (5322442235).

The spelling of 3221221012 in words is "three billion, two hundred twenty-one million, two hundred twenty-one thousand, twelve".