210021321010 has 8 divisors (see below), whose sum is σ = 378038377836. Its totient is φ = 84008528400.

The previous prime is 210021321007. The next prime is 210021321043. The reversal of 210021321010 is 10123120012.

It can be written as a sum of positive squares in 2 ways, for example, as 172566298921 + 37455022089 = 415411^2 + 193533^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10501066041 + ... + 10501066060.

Almost surely, 2^210021321010 is an apocalyptic number.

210021321010 is a deficient number, since it is larger than the sum of its proper divisors (168017056826).

210021321010 is a wasteful number, since it uses less digits than its factorization.

210021321010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21002132108.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 210021321010 its reverse (10123120012), we get a palindrome (220144441022).

The spelling of 210021321010 in words is "two hundred ten billion, twenty-one million, three hundred twenty-one thousand, ten".