1222121111222 has 16 divisors (see below), whose sum is σ = 2019634891344. Its totient is φ = 550009500000.

The previous prime is 1222121111177. The next prime is 1222121111273. The reversal of 1222121111222 is 2221111212221.

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 = 1222121111194 and 1222121111203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275002529 + ... + 275006972.

It is an arithmetic number, because the mean of its divisors is an integer number (126227180709).

Almost surely, 2^{1222121111222} is an apocalyptic number.

1222121111222 is a deficient number, since it is larger than the sum of its proper divisors (797513780122).

1222121111222 is a wasteful number, since it uses less digits than its factorization.

1222121111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550009615.

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

Adding to 1222121111222 its reverse (2221111212221), we get a palindrome (3443232323443).

The spelling of 1222121111222 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-two".