12122211222222 has 64 divisors (see below), whose sum is σ = 25695605376000. Its totient is φ = 3799338607616.

The previous prime is 12122211222157. The next prime is 12122211222223. The reversal of 12122211222222 is 22222211222121.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 12122211222192 and 12122211222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122211222223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 598647154 + ... + 598667402.

It is an arithmetic number, because the mean of its divisors is an integer number (401493834000).

Almost surely, 2^{12122211222222} is an apocalyptic number.

12122211222222 is an abundant number, since it is smaller than the sum of its proper divisors (13573394153778).

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

12122211222222 is a wasteful number, since it uses less digits than its factorization.

12122211222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25705.

The product of its digits is 1024, while the sum is 24.

Adding to 12122211222222 its reverse (22222211222121), we get a palindrome (34344422444343).

The spelling of 12122211222222 in words is "twelve trillion, one hundred twenty-two billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".