3120221220 has 24 divisors (see below), whose sum is σ = 8736619584. Its totient is φ = 832058976.

The previous prime is 3120221219. The next prime is 3120221243. The reversal of 3120221220 is 221220213.

It is a happy number.

It is a super-3 number, since 3×3120221220³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 3120221220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26001784 + ... + 26001903.

It is an arithmetic number, because the mean of its divisors is an integer number (364025816).

Almost surely, 2^3120221220 is an apocalyptic number.

3120221220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3120221220 is an abundant number, since it is smaller than the sum of its proper divisors (5616398364).

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

3120221220 is a wasteful number, since it uses less digits than its factorization.

3120221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52003699 (or 52003697 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 3120221220 is about 55858.9403766308. The cubic root of 3120221220 is about 1461.2632495750.

Adding to 3120221220 its reverse (221220213), we get a palindrome (3341441433).

The spelling of 3120221220 in words is "three billion, one hundred twenty million, two hundred twenty-one thousand, two hundred twenty".