1212211211222 has 16 divisors (see below), whose sum is σ = 1992513503232. Its totient is φ = 548534218920.

The previous prime is 1212211211207. The next prime is 1212211211317. The reversal of 1212211211222 is 2221121122121.

It is a super-2 number, since 2×1212211211222² (a number of 25 digits) contains 22 as substring.

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 = 1212211211194 and 1212211211203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123538838 + ... + 123548649.

It is an arithmetic number, because the mean of its divisors is an integer number (124532093952).

Almost surely, 2^{1212211211222} is an apocalyptic number.

1212211211222 is a deficient number, since it is larger than the sum of its proper divisors (780302292010).

1212211211222 is a wasteful number, since it uses less digits than its factorization.

1212211211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247087723.

The product of its digits is 128, while the sum is 20.

Adding to 1212211211222 its reverse (2221121122121), we get a palindrome (3433332333343).

The spelling of 1212211211222 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-two".