210102221021221 has 8 divisors (see below), whose sum is σ = 214068556672920. Its totient is φ = 206135964732672.

The previous prime is 210102221021219. The next prime is 210102221021227. The reversal of 210102221021221 is 122120122201012.

It can be written as a sum of positive squares in 4 ways, for example, as 43658395502500 + 166443825518721 = 6607450^2 + 12901311^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 210102221021221 - 2¹ = 210102221021219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210102221021227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14482576 + ... + 25098793.

It is an arithmetic number, because the mean of its divisors is an integer number (26758569584115).

Almost surely, 2^{210102221021221} is an apocalyptic number.

It is an amenable number.

210102221021221 is a deficient number, since it is larger than the sum of its proper divisors (3966335651699).

210102221021221 is a wasteful number, since it uses less digits than its factorization.

210102221021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39681575.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210102221021221 its reverse (122120122201012), we get a palindrome (332222343222233).

The spelling of 210102221021221 in words is "two hundred ten trillion, one hundred two billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-one".