1212211122222 has 8 divisors (see below), whose sum is σ = 2424422244456. Its totient is φ = 404070374072.

The previous prime is 1212211122193. The next prime is 1212211122257. The reversal of 1212211122222 is 2222211122121.

It is a sphenic number, since it is the product of 3 distinct primes.

1212211122222 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 101017593513 + ... + 101017593524.

It is an arithmetic number, because the mean of its divisors is an integer number (303052780557).

Almost surely, 2^{1212211122222} is an apocalyptic number.

1212211122222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1212211122222 is a wasteful number, since it uses less digits than its factorization.

1212211122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202035187042.

The product of its digits is 256, while the sum is 21.

Adding to 1212211122222 its reverse (2222211122121), we get a palindrome (3434422244343).

The spelling of 1212211122222 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-two thousand, two hundred twenty-two".