3221012772 has 72 divisors (see below), whose sum is σ = 8581809600. Its totient is φ = 1015823808.

The previous prime is 3221012719. The next prime is 3221012777. The reversal of 3221012772 is 2772101223.

It is not an unprimeable number, because it can be changed into a prime (3221012777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 604054 + ... + 609362.

It is an arithmetic number, because the mean of its divisors is an integer number (119191800).

Almost surely, 2^3221012772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3221012772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4290904800).

3221012772 is an abundant number, since it is smaller than the sum of its proper divisors (5360796828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3221012772 is a wasteful number, since it uses less digits than its factorization.

3221012772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6225 (or 6220 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 3221012772 is about 56753.9670155312. The cubic root of 3221012772 is about 1476.8310531330.

Adding to 3221012772 its reverse (2772101223), we get a palindrome (5993113995).

The spelling of 3221012772 in words is "three billion, two hundred twenty-one million, twelve thousand, seven hundred seventy-two".