202230021 has 16 divisors (see below), whose sum is σ = 318787200. Its totient is φ = 111574848.

The previous prime is 202230001. The next prime is 202230047. The reversal of 202230021 is 120032202.

It is not a de Polignac number, because 202230021 - 2¹³ = 202221829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202229979 and 202230006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202230001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165426 + ... + 166643.

It is an arithmetic number, because the mean of its divisors is an integer number (19924200).

Almost surely, 2^202230021 is an apocalyptic number.

202230021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

202230021 is a deficient number, since it is larger than the sum of its proper divisors (116557179).

202230021 is a wasteful number, since it uses less digits than its factorization.

202230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332108.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 202230021 is about 14220.7602117468. The cubic root of 202230021 is about 586.9690592346.

Adding to 202230021 its reverse (120032202), we get a palindrome (322262223).

The spelling of 202230021 in words is "two hundred two million, two hundred thirty thousand, twenty-one".