202330021 has 2 divisors, whose sum is σ = 202330022. Its totient is φ = 202330020.

The previous prime is 202329997. The next prime is 202330033. The reversal of 202330021 is 120033202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174609796 + 27720225 = 13214^2 + 5265^2 .

It is a cyclic number.

It is not a de Polignac number, because 202330021 - 2⁵ = 202329989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202329983 and 202330010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202330621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101165010 + 101165011.

It is an arithmetic number, because the mean of its divisors is an integer number (101165011).

Almost surely, 2^202330021 is an apocalyptic number.

It is an amenable number.

202330021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202330021 is an equidigital number, since it uses as much as digits as its factorization.

202330021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 202330021 is about 14224.2757636373. The cubic root of 202330021 is about 587.0657927023.

Adding to 202330021 its reverse (120033202), we get a palindrome (322363223).

The spelling of 202330021 in words is "two hundred two million, three hundred thirty thousand, twenty-one".