232221213421 has 4 divisors (see below), whose sum is σ = 240228841500. Its totient is φ = 224213585344.

The previous prime is 232221213403. The next prime is 232221213463. The reversal of 232221213421 is 124312122232.

232221213421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139193163396 + 93028050025 = 373086^2 + 305005^2 .

It is a cyclic number.

It is not a de Polignac number, because 232221213421 - 2¹⁷ = 232221082349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232221213401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4003813996 + ... + 4003814053.

It is an arithmetic number, because the mean of its divisors is an integer number (60057210375).

Almost surely, 2^232221213421 is an apocalyptic number.

It is an amenable number.

232221213421 is a deficient number, since it is larger than the sum of its proper divisors (8007628079).

232221213421 is an equidigital number, since it uses as much as digits as its factorization.

232221213421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8007628078.

The product of its digits is 2304, while the sum is 25.

Adding to 232221213421 its reverse (124312122232), we get a palindrome (356533335653).

The spelling of 232221213421 in words is "two hundred thirty-two billion, two hundred twenty-one million, two hundred thirteen thousand, four hundred twenty-one".