1222882221 has 8 divisors (see below), whose sum is σ = 1778737824. Its totient is φ = 741140720.

The previous prime is 1222882217. The next prime is 1222882247.

1222882221 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1222882221 - 2² = 1222882217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222882211) 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, 18528486 + ... + 18528551.

It is an arithmetic number, because the mean of its divisors is an integer number (222342228).

Almost surely, 2^1222882221 is an apocalyptic number.

1222882221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222882221 is a deficient number, since it is larger than the sum of its proper divisors (555855603).

1222882221 is a wasteful number, since it uses less digits than its factorization.

1222882221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37057051.

The product of its digits is 4096, while the sum is 30.

The square root of 1222882221 is about 34969.7329272043. The cubic root of 1222882221 is about 1069.3705270712.

It can be divided in two parts, 12228 and 82221, that added together give a palindrome (94449).

The spelling of 1222882221 in words is "one billion, two hundred twenty-two million, eight hundred eighty-two thousand, two hundred twenty-one".