2221021222 has 16 divisors (see below), whose sum is σ = 3846719520. Its totient is φ = 942052608.

The previous prime is 2221021189. The next prime is 2221021249. The reversal of 2221021222 is 2221201222.

It is a super-4 number, since 4×2221021222⁴ (a number of 38 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221021196 and 2221021205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816397 + ... + 819112.

It is an arithmetic number, because the mean of its divisors is an integer number (240419970).

Almost surely, 2^2221021222 is an apocalyptic number.

2221021222 is a deficient number, since it is larger than the sum of its proper divisors (1625698298).

2221021222 is a wasteful number, since it uses less digits than its factorization.

2221021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635615.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2221021222 is about 47127.7118264827. The cubic root of 2221021222 is about 1304.7207501805.

Adding to 2221021222 its reverse (2221201222), we get a palindrome (4442222444).

The spelling of 2221021222 in words is "two billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-two".