234012221 has 2 divisors, whose sum is σ = 234012222. Its totient is φ = 234012220.

The previous prime is 234012217. The next prime is 234012263. The reversal of 234012221 is 122210432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173949721 + 60062500 = 13189^2 + 7750^2 .

It is a cyclic number.

It is not a de Polignac number, because 234012221 - 2² = 234012217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 234012221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234012271) 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 as a sum of consecutive naturals, namely, 117006110 + 117006111.

It is an arithmetic number, because the mean of its divisors is an integer number (117006111).

Almost surely, 2^234012221 is an apocalyptic number.

It is an amenable number.

234012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

234012221 is an equidigital number, since it uses as much as digits as its factorization.

234012221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 234012221 is about 15297.4579914442. The cubic root of 234012221 is about 616.2347423284.

Adding to 234012221 its reverse (122210432), we get a palindrome (356222653).

The spelling of 234012221 in words is "two hundred thirty-four million, twelve thousand, two hundred twenty-one".