210221220102221 has 8 divisors (see below), whose sum is σ = 210267155750400. Its totient is φ = 210175285314960.

The previous prime is 210221220102197. The next prime is 210221220102233. The reversal of 210221220102221 is 122201022122012.

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 210221220102221 - 2¹⁰ = 210221220101197 is a prime.

It is a super-2 number, since 2×210221220102221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210221220102193 and 210221220102202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221220102241) 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, 839822360 + ... + 840072638.

It is an arithmetic number, because the mean of its divisors is an integer number (26283394468800).

Almost surely, 2^{210221220102221} is an apocalyptic number.

It is an amenable number.

210221220102221 is a deficient number, since it is larger than the sum of its proper divisors (45935648179).

210221220102221 is a wasteful number, since it uses less digits than its factorization.

210221220102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430459.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 210221220102221 its reverse (122201022122012), we get a palindrome (332422242224233).

The spelling of 210221220102221 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred twenty million, one hundred two thousand, two hundred twenty-one".