3122111220 has 48 divisors (see below), whose sum is σ = 8763998208. Its totient is φ = 830459520.

The previous prime is 3122111147. The next prime is 3122111249. The reversal of 3122111220 is 221112213.

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 3122111220.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 41716 + ... + 89355.

It is an arithmetic number, because the mean of its divisors is an integer number (182583296).

Almost surely, 2^3122111220 is an apocalyptic number.

3122111220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3122111220 is an abundant number, since it is smaller than the sum of its proper divisors (5641886988).

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

3122111220 is a wasteful number, since it uses less digits than its factorization.

3122111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131480 (or 131478 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 3122111220 is about 55875.8554296934. The cubic root of 3122111220 is about 1461.5582318755.

Adding to 3122111220 its reverse (221112213), we get a palindrome (3343223433).

The spelling of 3122111220 in words is "three billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty".