1212211212222 has 16 divisors (see below), whose sum is σ = 2529832095360. Its totient is φ = 386502125592.

The previous prime is 1212211212197. The next prime is 1212211212227. The reversal of 1212211212222 is 2222121122121.

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 (1212211212227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4392069472 + ... + 4392069747.

It is an arithmetic number, because the mean of its divisors is an integer number (158114505960).

Almost surely, 2^{1212211212222} is an apocalyptic number.

1212211212222 is an abundant number, since it is smaller than the sum of its proper divisors (1317620883138).

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

1212211212222 is a wasteful number, since it uses less digits than its factorization.

1212211212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8784139247.

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

Adding to 1212211212222 its reverse (2222121122121), we get a palindrome (3434332334343).

The spelling of 1212211212222 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty-two".