3221220000 has 240 divisors, whose sum is σ = 10859298912. Its totient is φ = 835200000.

The previous prime is 3221219983. The next prime is 3221220007. The reversal of 3221220000 is 221223.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (3221220007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2219275 + ... + 2220725.

Almost surely, 2^3221220000 is an apocalyptic number.

3221220000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3221220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5429649456).

3221220000 is an abundant number, since it is smaller than the sum of its proper divisors (7638078912).

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

3221220000 is a wasteful number, since it uses less digits than its factorization.

3221220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521 (or 1498 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 3221220000 is about 56755.7926559043. The cubic root of 3221220000 is about 1476.8627237290.

Adding to 3221220000 its reverse (221223), we get a palindrome (3221441223).

The spelling of 3221220000 in words is "three billion, two hundred twenty-one million, two hundred twenty thousand".