2221122221222 has 16 divisors (see below), whose sum is σ = 3509781470640. Its totient is φ = 1051286610528.

The previous prime is 2221122221177. The next prime is 2221122221231. The reversal of 2221122221222 is 2221222211222.

It is a super-2 number, since 2×2221122221222² (a number of 25 digits) contains 22 as substring.

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

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, 22837373 + ... + 22934424.

It is an arithmetic number, because the mean of its divisors is an integer number (219361341915).

Almost surely, 2^{2221122221222} is an apocalyptic number.

2221122221222 is a deficient number, since it is larger than the sum of its proper divisors (1288659249418).

2221122221222 is a wasteful number, since it uses less digits than its factorization.

2221122221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45773095.

The product of its digits is 1024, while the sum is 23.

Adding to 2221122221222 its reverse (2221222211222), we get a palindrome (4442344432444).

The spelling of 2221122221222 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-two".