221002200221 has 16 divisors (see below), whose sum is σ = 244581482880. Its totient is φ = 198018712320.

The previous prime is 221002200163. The next prime is 221002200233. The reversal of 221002200221 is 122002200122.

It is not a de Polignac number, because 221002200221 - 2¹⁸ = 221001938077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221002200196 and 221002200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002200241) 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, 54185 + ... + 667038.

It is an arithmetic number, because the mean of its divisors is an integer number (15286342680).

Almost surely, 2^221002200221 is an apocalyptic number.

It is an amenable number.

221002200221 is a deficient number, since it is larger than the sum of its proper divisors (23579282659).

221002200221 is a wasteful number, since it uses less digits than its factorization.

221002200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721636.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221002200221 its reverse (122002200122), we get a palindrome (343004400343).

Subtracting from 221002200221 its reverse (122002200122), we obtain a palindrome (99000000099).

The spelling of 221002200221 in words is "two hundred twenty-one billion, two million, two hundred thousand, two hundred twenty-one".