1222224142221 has 20 divisors (see below), whose sum is σ = 1827679835872. Its totient is φ = 813973420008.

The previous prime is 1222224142199. The next prime is 1222224142261. The reversal of 1222224142221 is 1222414222221.

1222224142221 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 22 + 414 + 2 + 221 = 666.

It is not a de Polignac number, because 1222224142221 - 2¹¹ = 1222224140173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222224142261) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7723735 + ... + 7880388.

Almost surely, 2^{1222224142221} is an apocalyptic number.

It is an amenable number.

1222224142221 is a deficient number, since it is larger than the sum of its proper divisors (605455693651).

1222224142221 is an equidigital number, since it uses as much as digits as its factorization.

1222224142221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15605102 (or 15605093 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

Adding to 1222224142221 its reverse (1222414222221), we get a palindrome (2444638364442).

The spelling of 1222224142221 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-four million, one hundred forty-two thousand, two hundred twenty-one".