1222332221 has 32 divisors (see below), whose sum is σ = 1399942656. Its totient is φ = 1057536000.

The previous prime is 1222332203. The next prime is 1222332239.

It is a happy number.

1222332221 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1222332203) and next prime (1222332239).

It is a cyclic number.

It is not a de Polignac number, because 1222332221 - 2⁶ = 1222332157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222332193 and 1222332202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222332271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4510316 + ... + 4510586.

It is an arithmetic number, because the mean of its divisors is an integer number (43748208).

Almost surely, 2^1222332221 is an apocalyptic number.

1222332221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222332221 is a deficient number, since it is larger than the sum of its proper divisors (177610435).

1222332221 is a wasteful number, since it uses less digits than its factorization.

1222332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533.

The product of its digits is 576, while the sum is 20.

The square root of 1222332221 is about 34961.8680994022. The cubic root of 1222332221 is about 1069.2101840233.

It can be divided in two parts, 12223 and 32221, that added together give a palindrome (44444).

The spelling of 1222332221 in words is "one billion, two hundred twenty-two million, three hundred thirty-two thousand, two hundred twenty-one".