210021000010221 has 8 divisors (see below), whose sum is σ = 280028496933664. Its totient is φ = 140013751546800.

The previous prime is 210021000010207. The next prime is 210021000010229. The reversal of 210021000010221 is 122010000120012.

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

It is a de Polignac number, because none of the positive numbers 2^k-210021000010221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210021000010197 and 210021000010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021000010229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60133630 + ... + 63530271.

It is an arithmetic number, because the mean of its divisors is an integer number (35003562116708).

Almost surely, 2^{210021000010221} is an apocalyptic number.

It is an amenable number.

210021000010221 is a deficient number, since it is larger than the sum of its proper divisors (70007496923443).

210021000010221 is a wasteful number, since it uses less digits than its factorization.

210021000010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124230011.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210021000010221 its reverse (122010000120012), we get a palindrome (332031000130233).

The spelling of 210021000010221 in words is "two hundred ten trillion, twenty-one billion, ten thousand, two hundred twenty-one".