11221220221222 has 32 divisors (see below), whose sum is σ = 19023227615520. Its totient is φ = 4917399002880.

The previous prime is 11221220221217. The next prime is 11221220221231. The reversal of 11221220221222 is 22212202212211.

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

It is a junction number, because it is equal to n+sod(n) for n = 11221220221193 and 11221220221202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12557823 + ... + 13421674.

It is an arithmetic number, because the mean of its divisors is an integer number (594475862985).

Almost surely, 2^{11221220221222} is an apocalyptic number.

11221220221222 is a deficient number, since it is larger than the sum of its proper divisors (7802007394298).

11221220221222 is a wasteful number, since it uses less digits than its factorization.

11221220221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25980216.

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

Adding to 11221220221222 its reverse (22212202212211), we get a palindrome (33433422433433).

The spelling of 11221220221222 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-two".