2221212222122 has 24 divisors (see below), whose sum is σ = 3392293999500. Its totient is φ = 1090756249088.

The previous prime is 2221212222107. The next prime is 2221212222169. The reversal of 2221212222122 is 2212222121222.

It can be written as a sum of positive squares in 6 ways, for example, as 67154057881 + 2154058164241 = 259141^2 + 1467671^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1889954 + ... + 2830962.

Almost surely, 2^{2221212222122} is an apocalyptic number.

2221212222122 is a deficient number, since it is larger than the sum of its proper divisors (1171081777378).

2221212222122 is an equidigital number, since it uses as much as digits as its factorization.

2221212222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941338 (or 941249 counting only the distinct ones).

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

Adding to 2221212222122 its reverse (2212222121222), we get a palindrome (4433434343344).

The spelling of 2221212222122 in words is "two trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-two".