4233312221 has 4 divisors (see below), whose sum is σ = 4302710844. Its totient is φ = 4163913600.

The previous prime is 4233312217. The next prime is 4233312227. The reversal of 4233312221 is 1222133324.

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 467035321 + 3766276900 = 21611^2 + 61370^2 .

It is a cyclic number.

It is not a de Polignac number, because 4233312221 - 2² = 4233312217 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 (4233312227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34699220 + ... + 34699341.

It is an arithmetic number, because the mean of its divisors is an integer number (1075677711).

Almost surely, 2^4233312221 is an apocalyptic number.

It is an amenable number.

4233312221 is a deficient number, since it is larger than the sum of its proper divisors (69398623).

4233312221 is an equidigital number, since it uses as much as digits as its factorization.

4233312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69398622.

The product of its digits is 1728, while the sum is 23.

The square root of 4233312221 is about 65063.9087436345. The cubic root of 4233312221 is about 1617.6830441976.

Adding to 4233312221 its reverse (1222133324), we get a palindrome (5455445545).

The spelling of 4233312221 in words is "four billion, two hundred thirty-three million, three hundred twelve thousand, two hundred twenty-one".