210221132 has 24 divisors (see below), whose sum is σ = 404892432. Its totient is φ = 94707200.

The previous prime is 210221119. The next prime is 210221153. The reversal of 210221132 is 231122012.

It is a happy number.

It is a super-2 number, since 2×210221132² = 88385848678722848, which contains 22 as substring.

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, 16169 + ... + 26112.

It is an arithmetic number, because the mean of its divisors is an integer number (16870518).

Almost surely, 2^210221132 is an apocalyptic number.

210221132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

210221132 is a deficient number, since it is larger than the sum of its proper divisors (194671300).

210221132 is a wasteful number, since it uses less digits than its factorization.

210221132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42409 (or 42407 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 210221132 is about 14499.0045175522. The cubic root of 210221132 is about 594.6007556356.

Adding to 210221132 its reverse (231122012), we get a palindrome (441343144).

The spelling of 210221132 in words is "two hundred ten million, two hundred twenty-one thousand, one hundred thirty-two".