2221221330 has 96 divisors (see below), whose sum is σ = 6054048000. Its totient is φ = 564399360.

The previous prime is 2221221313. The next prime is 2221221347. The reversal of 2221221330 is 331221222.

It is an interprime number because it is at equal distance from previous prime (2221221313) and next prime (2221221347).

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 47 ways as a sum of consecutive naturals, for example, 151671 + ... + 165669.

It is an arithmetic number, because the mean of its divisors is an integer number (63063000).

Almost surely, 2^2221221330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221221330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3027024000).

2221221330 is an abundant number, since it is smaller than the sum of its proper divisors (3832826670).

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

2221221330 is a wasteful number, since it uses less digits than its factorization.

2221221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14096 (or 14093 counting only the distinct ones).

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

The square root of 2221221330 is about 47129.8348182974. The cubic root of 2221221330 is about 1304.7599329397.

Adding to 2221221330 its reverse (331221222), we get a palindrome (2552442552).

The spelling of 2221221330 in words is "two billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred thirty".