1232232221 has 4 divisors (see below), whose sum is σ = 1344253344. Its totient is φ = 1120211100.

The previous prime is 1232232217. The next prime is 1232232257. The reversal of 1232232221 is 1222322321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1232232221 - 2² = 1232232217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1232232193 and 1232232202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232232121) 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 3 ways as a sum of consecutive naturals, for example, 56010545 + ... + 56010566.

It is an arithmetic number, because the mean of its divisors is an integer number (336063336).

Almost surely, 2^1232232221 is an apocalyptic number.

1232232221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1232232221 is a deficient number, since it is larger than the sum of its proper divisors (112021123).

1232232221 is a wasteful number, since it uses less digits than its factorization.

1232232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112021122.

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

The square root of 1232232221 is about 35103.1653985791. The cubic root of 1232232221 is about 1072.0890334667.

Adding to 1232232221 its reverse (1222322321), we get a palindrome (2454554542).

It can be divided in two parts, 1232232 and 221, that multiplied together give a palindrome (272323272).

The spelling of 1232232221 in words is "one billion, two hundred thirty-two million, two hundred thirty-two thousand, two hundred twenty-one".