1222211221222 has 16 divisors (see below), whose sum is σ = 1916252316000. Its totient is φ = 583550061952.

The previous prime is 1222211221211. The next prime is 1222211221241. The reversal of 1222211221222 is 2221221122221.

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 = 1222211221193 and 1222211221202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22375597 + ... + 22430152.

It is an arithmetic number, because the mean of its divisors is an integer number (119765769750).

Almost surely, 2^{1222211221222} is an apocalyptic number.

1222211221222 is a deficient number, since it is larger than the sum of its proper divisors (694041094778).

1222211221222 is a wasteful number, since it uses less digits than its factorization.

1222211221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44806367.

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

Adding to 1222211221222 its reverse (2221221122221), we get a palindrome (3443432343443).

Subtracting 1222211221222 from its reverse (2221221122221), we obtain a palindrome (999009900999).

The spelling of 1222211221222 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, two hundred twenty-two".