210021010 has 8 divisors (see below), whose sum is σ = 378037836. Its totient is φ = 84008400.

The previous prime is 210020989. The next prime is 210021047. The reversal of 210021010 is 10120012.

It can be written as a sum of positive squares in 2 ways, for example, as 168766081 + 41254929 = 12991^2 + 6423^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 210020984 and 210021002.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10501041 + ... + 10501060.

Almost surely, 2^210021010 is an apocalyptic number.

210021010 is a deficient number, since it is larger than the sum of its proper divisors (168016826).

210021010 is a wasteful number, since it uses less digits than its factorization.

210021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21002108.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 210021010 is about 14492.1016419290. The cubic root of 210021010 is about 594.4120171233.

Adding to 210021010 its reverse (10120012), we get a palindrome (220141022).

The spelling of 210021010 in words is "two hundred ten million, twenty-one thousand, ten".