1122220221 has 8 divisors (see below), whose sum is σ = 1547890080. Its totient is φ = 722348592.

The previous prime is 1122220207. The next prime is 1122220241. The reversal of 1122220221 is 1220222211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1122220221 - 2⁵ = 1122220189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1122220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122220241) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6449455 + ... + 6449628.

It is an arithmetic number, because the mean of its divisors is an integer number (193486260).

Almost surely, 2^1122220221 is an apocalyptic number.

It is an amenable number.

1122220221 is a deficient number, since it is larger than the sum of its proper divisors (425669859).

1122220221 is a wasteful number, since it uses less digits than its factorization.

1122220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12899115.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1122220221 is about 33499.5555343649. Note that the first 4 decimals coincide. The cubic root of 1122220221 is about 1039.1845867412.

Adding to 1122220221 its reverse (1220222211), we get a palindrome (2342442432).

The spelling of 1122220221 in words is "one billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".