1220211111222 has 48 divisors (see below), whose sum is σ = 2689267211280. Its totient is φ = 399744075456.

The previous prime is 1220211111211. The next prime is 1220211111257. The reversal of 1220211111222 is 2221111120221.

1220211111222 is a `hidden beast` number, since 1 + 220 + 211 + 1 + 11 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1220211111195 and 1220211111204.

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 23 ways as a sum of consecutive naturals, for example, 4206408 + ... + 4487124.

It is an arithmetic number, because the mean of its divisors is an integer number (56026400235).

Almost surely, 2^{1220211111222} is an apocalyptic number.

1220211111222 is an abundant number, since it is smaller than the sum of its proper divisors (1469056100058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220211111222 is a wasteful number, since it uses less digits than its factorization.

1220211111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284877 (or 284874 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1220211111222 its reverse (2221111120221), we get a palindrome (3441322231443).

The spelling of 1220211111222 in words is "one trillion, two hundred twenty billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty-two".