222211122121212 has 96 divisors (see below), whose sum is σ = 614603736015360. Its totient is φ = 61161362323200.

The previous prime is 222211122121207. The next prime is 222211122121213. The reversal of 222211122121212 is 212121221112222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211122121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 353629162 + ... + 354256977.

It is an arithmetic number, because the mean of its divisors is an integer number (6402122250160).

Almost surely, 2^{222211122121212} is an apocalyptic number.

It is an amenable number.

222211122121212 is an abundant number, since it is smaller than the sum of its proper divisors (392392613894148).

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

222211122121212 is a wasteful number, since it uses less digits than its factorization.

222211122121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707886291 (or 707886289 counting only the distinct ones).

The product of its digits is 512, while the sum is 24.

Adding to 222211122121212 its reverse (212121221112222), we get a palindrome (434332343233434).

The spelling of 222211122121212 in words is "two hundred twenty-two trillion, two hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".