210221012002221 has 24 divisors (see below), whose sum is σ = 340210253663904. Its totient is φ = 123963250318560.

The previous prime is 210221012002189. The next prime is 210221012002237. The reversal of 210221012002221 is 122200210122012.

It is a happy number.

210221012002221 is a `hidden beast` number, since 21 + 0 + 221 + 0 + 1 + 200 + 2 + 221 = 666.

It is not a de Polignac number, because 210221012002221 - 2⁵ = 210221012002189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210221012002194 and 210221012002203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221012002021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28695193171 + ... + 28695200496.

It is an arithmetic number, because the mean of its divisors is an integer number (14175427235996).

Almost surely, 2^{210221012002221} is an apocalyptic number.

It is an amenable number.

210221012002221 is a deficient number, since it is larger than the sum of its proper divisors (129989241661683).

210221012002221 is a wasteful number, since it uses less digits than its factorization.

210221012002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57390393721 (or 57390393718 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210221012002221 its reverse (122200210122012), we get a palindrome (332421222124233).

The spelling of 210221012002221 in words is "two hundred ten trillion, two hundred twenty-one billion, twelve million, two thousand, two hundred twenty-one".