210210000010221 has 32 divisors (see below), whose sum is σ = 290194425900288. Its totient is φ = 135258743554560.

The previous prime is 210210000010217. The next prime is 210210000010247. The reversal of 210210000010221 is 122010000012012.

It is not a de Polignac number, because 210210000010221 - 2² = 210210000010217 is a prime.

It is a super-2 number, since 2×210210000010221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210210000010197 and 210210000010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210210000010271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4309795 + ... + 20952191.

It is an arithmetic number, because the mean of its divisors is an integer number (9068575809384).

Almost surely, 2^{210210000010221} is an apocalyptic number.

It is an amenable number.

210210000010221 is a deficient number, since it is larger than the sum of its proper divisors (79984425890067).

210210000010221 is a wasteful number, since it uses less digits than its factorization.

210210000010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16643541.

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

Adding to 210210000010221 its reverse (122010000012012), we get a palindrome (332220000022233).

The spelling of 210210000010221 in words is "two hundred ten trillion, two hundred ten billion, ten thousand, two hundred twenty-one".