221110200201221 has 4 divisors (see below), whose sum is σ = 232747579159200. Its totient is φ = 209472821243244.

The previous prime is 221110200201199. The next prime is 221110200201251. The reversal of 221110200201221 is 122102002011122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221110200201221 - 2⁶ = 221110200201157 is a prime.

It is a super-2 number, since 2×221110200201221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221110200201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110200201251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5818689478961 + ... + 5818689478998.

It is an arithmetic number, because the mean of its divisors is an integer number (58186894789800).

Almost surely, 2^{221110200201221} is an apocalyptic number.

It is an amenable number.

221110200201221 is a deficient number, since it is larger than the sum of its proper divisors (11637378957979).

221110200201221 is a wasteful number, since it uses less digits than its factorization.

221110200201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11637378957978.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221110200201221 its reverse (122102002011122), we get a palindrome (343212202212343).

The spelling of 221110200201221 in words is "two hundred twenty-one trillion, one hundred ten billion, two hundred million, two hundred one thousand, two hundred twenty-one".