3112021220 has 48 divisors (see below), whose sum is σ = 8147841408. Its totient is φ = 969980160.

The previous prime is 3112021181. The next prime is 3112021223. The reversal of 3112021220 is 221202113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 3112021195 and 3112021204.

It is not an unprimeable number, because it can be changed into a prime (3112021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1008857 + ... + 1011936.

It is an arithmetic number, because the mean of its divisors is an integer number (169746696).

Almost surely, 2^3112021220 is an apocalyptic number.

It is an amenable number.

3112021220 is an abundant number, since it is smaller than the sum of its proper divisors (5035820188).

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

3112021220 is a wasteful number, since it uses less digits than its factorization.

3112021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020820 (or 2020818 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3112021220 is about 55785.4929170658. The cubic root of 3112021220 is about 1459.9820508208.

Adding to 3112021220 its reverse (221202113), we get a palindrome (3333223333).

The spelling of 3112021220 in words is "three billion, one hundred twelve million, twenty-one thousand, two hundred twenty".