1222222201222 has 16 divisors (see below), whose sum is σ = 2001514017744. Its totient is φ = 555134976000.

The previous prime is 1222222201141. The next prime is 1222222201223. The reversal of 1222222201222 is 2221022222221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1222222201193 and 1222222201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222222201223) 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 7 ways as a sum of consecutive naturals, for example, 20998779 + ... + 21056902.

It is an arithmetic number, because the mean of its divisors is an integer number (125094626109).

Almost surely, 2^{1222222201222} is an apocalyptic number.

1222222201222 is a deficient number, since it is larger than the sum of its proper divisors (779291816522).

1222222201222 is a wasteful number, since it uses less digits than its factorization.

1222222201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42057015.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 1222222201222 its reverse (2221022222221), we get a palindrome (3443244423443).

The spelling of 1222222201222 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred one thousand, two hundred twenty-two".