1212222211222 has 24 divisors (see below), whose sum is σ = 2004390864000. Its totient is φ = 549431232240.

The previous prime is 1212222211169. The next prime is 1212222211237. The reversal of 1212222211222 is 2221122222121.

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

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 = 1212222211193 and 1212222211202.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7092022 + ... + 7260937.

It is an arithmetic number, because the mean of its divisors is an integer number (83516286000).

Almost surely, 2^{1212222211222} is an apocalyptic number.

1212222211222 is a deficient number, since it is larger than the sum of its proper divisors (792168652778).

1212222211222 is a wasteful number, since it uses less digits than its factorization.

1212222211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14353332 (or 14353321 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

Adding to 1212222211222 its reverse (2221122222121), we get a palindrome (3433344433343).

The spelling of 1212222211222 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twenty-two".