210220210221 has 16 divisors (see below), whose sum is σ = 320507195904. Its totient is φ = 120061470384.

The previous prime is 210220210177. The next prime is 210220210297. The reversal of 210220210221 is 122012022012.

It is not a de Polignac number, because 210220210221 - 2⁶ = 210220210157 is a prime.

It is a super-2 number, since 2×210220210221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210220210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220290221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2641695 + ... + 2720108.

It is an arithmetic number, because the mean of its divisors is an integer number (20031699744).

Almost surely, 2^210220210221 is an apocalyptic number.

210220210221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210220210221 is a deficient number, since it is larger than the sum of its proper divisors (110286985683).

210220210221 is a wasteful number, since it uses less digits than its factorization.

210220210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5363680.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210220210221 its reverse (122012022012), we get a palindrome (332232232233).

The spelling of 210220210221 in words is "two hundred ten billion, two hundred twenty million, two hundred ten thousand, two hundred twenty-one".