210021121213210 has 8 divisors (see below), whose sum is σ = 378038018183796. Its totient is φ = 84008448485280.

The previous prime is 210021121213171. The next prime is 210021121213229. The reversal of 210021121213210 is 12312121120012.

It can be written as a sum of positive squares in 2 ways, for example, as 193486236064489 + 16534885148721 = 13909933^2 + 4066311^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10501056060651 + ... + 10501056060670.

Almost surely, 2^{210021121213210} is an apocalyptic number.

210021121213210 is a deficient number, since it is larger than the sum of its proper divisors (168016896970586).

210021121213210 is a wasteful number, since it uses less digits than its factorization.

210021121213210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21002112121328.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 210021121213210 its reverse (12312121120012), we get a palindrome (222333242333222).

The spelling of 210021121213210 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred ten".