12211212122222 has 4 divisors (see below), whose sum is σ = 18316818183336. Its totient is φ = 6105606061110.

The previous prime is 12211212122129. The next prime is 12211212122261. The reversal of 12211212122222 is 22222121211221.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×12211212122222² (a number of 27 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 as a sum of consecutive naturals, namely, 3052803030554 + ... + 3052803030557.

It is an arithmetic number, because the mean of its divisors is an integer number (4579204545834).

Almost surely, 2^{12211212122222} is an apocalyptic number.

12211212122222 is a deficient number, since it is larger than the sum of its proper divisors (6105606061114).

12211212122222 is an equidigital number, since it uses as much as digits as its factorization.

12211212122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105606061113.

The product of its digits is 512, while the sum is 23.

Adding to 12211212122222 its reverse (22222121211221), we get a palindrome (34433333333443).

The spelling of 12211212122222 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twenty-two".