210221121010 has 8 divisors (see below), whose sum is σ = 378398017836. Its totient is φ = 84088448400.

The previous prime is 210221121007. The next prime is 210221121029. The reversal of 210221121010 is 10121122012.

210221121010 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 210076472281 + 144648729 = 458341^2 + 12027^2 .

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, 10511056041 + ... + 10511056060.

Almost surely, 2^210221121010 is an apocalyptic number.

210221121010 is a deficient number, since it is larger than the sum of its proper divisors (168176896826).

210221121010 is a wasteful number, since it uses less digits than its factorization.

210221121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21022112108.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210221121010 its reverse (10121122012), we get a palindrome (220342243022).

The spelling of 210221121010 in words is "two hundred ten billion, two hundred twenty-one million, one hundred twenty-one thousand, ten".