2221121322 has 96 divisors (see below), whose sum is σ = 5668970112. Its totient is φ = 615226752.

The previous prime is 2221121317. The next prime is 2221121323. The reversal of 2221121322 is 2231211222.

2221121322 is a `hidden beast` number, since 2 + 221 + 121 + 322 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2221121295 and 2221121304.

It is not an unprimeable number, because it can be changed into a prime (2221121323) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1617028 + ... + 1618400.

It is an arithmetic number, because the mean of its divisors is an integer number (59051772).

Almost surely, 2^2221121322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221121322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2834485056).

2221121322 is an abundant number, since it is smaller than the sum of its proper divisors (3447848790).

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

2221121322 is a wasteful number, since it uses less digits than its factorization.

2221121322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772 (or 1769 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2221121322 is about 47128.7738223689. The cubic root of 2221121322 is about 1304.7403508614.

Adding to 2221121322 its reverse (2231211222), we get a palindrome (4452332544).

The spelling of 2221121322 in words is "two billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred twenty-two".