3122001220 has 72 divisors (see below), whose sum is σ = 7197139656. Its totient is φ = 1136858112.

The previous prime is 3122001161. The next prime is 3122001221. The reversal of 3122001220 is 221002213.

3122001220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 2672476416 + 449524804 = 51696^2 + 21202^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 3122001220.

It is not an unprimeable number, because it can be changed into a prime (3122001221) 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, 240414 + ... + 253066.

It is an arithmetic number, because the mean of its divisors is an integer number (99960273).

Almost surely, 2^3122001220 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 3122001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3598569828).

3122001220 is an abundant number, since it is smaller than the sum of its proper divisors (4075138436).

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

3122001220 is a wasteful number, since it uses less digits than its factorization.

3122001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12761 (or 12746 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 3122001220 is about 55874.8710960482. The cubic root of 3122001220 is about 1461.5410668566.

Adding to 3122001220 its reverse (221002213), we get a palindrome (3343003433).

The spelling of 3122001220 in words is "three billion, one hundred twenty-two million, one thousand, two hundred twenty".