234202021 has 2 divisors, whose sum is σ = 234202022. Its totient is φ = 234202020.

The previous prime is 234202009. The next prime is 234202043. The reversal of 234202021 is 120202432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233661796 + 540225 = 15286^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 234202021 - 2¹⁵ = 234169253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 234201986 and 234202004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234202321) 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 as a sum of consecutive naturals, namely, 117101010 + 117101011.

It is an arithmetic number, because the mean of its divisors is an integer number (117101011).

Almost surely, 2^234202021 is an apocalyptic number.

It is an amenable number.

234202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

234202021 is an equidigital number, since it uses as much as digits as its factorization.

234202021 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 16.

The square root of 234202021 is about 15303.6603791381. The cubic root of 234202021 is about 616.4013002210.

Adding to 234202021 its reverse (120202432), we get a palindrome (354404453).

The spelling of 234202021 in words is "two hundred thirty-four million, two hundred two thousand, twenty-one".