210221330 has 16 divisors (see below), whose sum is σ = 412798464. Its totient is φ = 76444080.

The previous prime is 210221329. The next prime is 210221369. The reversal of 210221330 is 33122012.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955442 + ... + 955661.

It is an arithmetic number, because the mean of its divisors is an integer number (25799904).

Almost surely, 2^210221330 is an apocalyptic number.

210221330 is a deficient number, since it is larger than the sum of its proper divisors (202577134).

210221330 is a wasteful number, since it uses less digits than its factorization.

210221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911121.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 210221330 is about 14499.0113456056. The cubic root of 210221330 is about 594.6009423135.

Adding to 210221330 its reverse (33122012), we get a palindrome (243343342).

It can be divided in two parts, 2102 and 21330, that added together give a palindrome (23432).

The spelling of 210221330 in words is "two hundred ten million, two hundred twenty-one thousand, three hundred thirty".