1232331221 has 8 divisors (see below), whose sum is σ = 1344657888. Its totient is φ = 1120054000.

The previous prime is 1232331193. The next prime is 1232331229. The reversal of 1232331221 is 1221332321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232331221 is a prime.

It is a super-3 number, since 3×1232331221³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1232331193 and 1232331202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232331229) 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, 56426 + ... + 75156.

It is an arithmetic number, because the mean of its divisors is an integer number (168082236).

Almost surely, 2^1232331221 is an apocalyptic number.

1232331221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1232331221 is a deficient number, since it is larger than the sum of its proper divisors (112326667).

1232331221 is a wasteful number, since it uses less digits than its factorization.

1232331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24723.

The product of its digits is 432, while the sum is 20.

The square root of 1232331221 is about 35104.5754994986. The cubic root of 1232331221 is about 1072.1177439566.

Adding to 1232331221 its reverse (1221332321), we get a palindrome (2453663542).

The spelling of 1232331221 in words is "one billion, two hundred thirty-two million, three hundred thirty-one thousand, two hundred twenty-one".