2221120212 has 96 divisors (see below), whose sum is σ = 5581965312. Its totient is φ = 685593216.

The previous prime is 2221120177. The next prime is 2221120229. The reversal of 2221120212 is 2120211222.

It is a junction number, because it is equal to n+sod(n) for n = 2221120191 and 2221120200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2685343 + ... + 2686169.

It is an arithmetic number, because the mean of its divisors is an integer number (58145472).

Almost surely, 2^2221120212 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 2221120212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2790982656).

2221120212 is an abundant number, since it is smaller than the sum of its proper divisors (3360845100).

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

2221120212 is a wasteful number, since it uses less digits than its factorization.

2221120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2221120212 is about 47128.7620461221. The cubic root of 2221120212 is about 1304.7401335144.

Adding to 2221120212 its reverse (2120211222), we get a palindrome (4341331434).

The spelling of 2221120212 in words is "two billion, two hundred twenty-one million, one hundred twenty thousand, two hundred twelve".