2220331212 has 72 divisors (see below), whose sum is σ = 6146300160. Its totient is φ = 670237920.

The previous prime is 2220331207. The next prime is 2220331297. The reversal of 2220331212 is 2121330222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93489 + ... + 114807.

It is an arithmetic number, because the mean of its divisors is an integer number (85365280).

Almost surely, 2^2220331212 is an apocalyptic number.

2220331212 is a gapful number since it is divisible by the number (22) 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 2220331212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3073150080).

2220331212 is an abundant number, since it is smaller than the sum of its proper divisors (3925968948).

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

2220331212 is a wasteful number, since it uses less digits than its factorization.

2220331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21603 (or 21598 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2220331212 is about 47120.3906180753. The cubic root of 2220331212 is about 1304.5856226092.

Adding to 2220331212 its reverse (2121330222), we get a palindrome (4341661434).

The spelling of 2220331212 in words is "two billion, two hundred twenty million, three hundred thirty-one thousand, two hundred twelve".