2220111223212 has 96 divisors (see below), whose sum is σ = 5606108770752. Its totient is φ = 681207095296.

The previous prime is 2220111223181. The next prime is 2220111223219. The reversal of 2220111223212 is 2123221110222.

It is not an unprimeable number, because it can be changed into a prime (2220111223219) 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 31 ways as a sum of consecutive naturals, for example, 3103528 + ... + 3751280.

It is an arithmetic number, because the mean of its divisors is an integer number (58396966362).

Almost surely, 2^{2220111223212} 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 2220111223212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2803054385376).

2220111223212 is an abundant number, since it is smaller than the sum of its proper divisors (3385997547540).

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

2220111223212 is a wasteful number, since it uses less digits than its factorization.

2220111223212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648147 (or 648145 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2220111223212 its reverse (2123221110222), we get a palindrome (4343332333434).

The spelling of 2220111223212 in words is "two trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-three thousand, two hundred twelve".