210001102221 has 16 divisors (see below), whose sum is σ = 296565926400. Its totient is φ = 131723716608.

The previous prime is 210001102217. The next prime is 210001102237. The reversal of 210001102221 is 122201100012.

It is not a de Polignac number, because 210001102221 - 2² = 210001102217 is a prime.

It is a super-2 number, since 2×210001102221² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210001102197 and 210001102206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001102211) 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, 488061 + ... + 811298.

It is an arithmetic number, because the mean of its divisors is an integer number (18535370400).

Almost surely, 2^210001102221 is an apocalyptic number.

It is an amenable number.

210001102221 is a deficient number, since it is larger than the sum of its proper divisors (86564824179).

210001102221 is a wasteful number, since it uses less digits than its factorization.

210001102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302548.

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

Adding to 210001102221 its reverse (122201100012), we get a palindrome (332202202233).

The spelling of 210001102221 in words is "two hundred ten billion, one million, one hundred two thousand, two hundred twenty-one".