221011200221 has 4 divisors (see below), whose sum is σ = 252584228832. Its totient is φ = 189438171612.

The previous prime is 221011200209. The next prime is 221011200251. The reversal of 221011200221 is 122002110122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122002110122 = 2 ⋅61001055061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221011200221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221011200196 and 221011200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221011200251) 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, 15786514295 + ... + 15786514308.

It is an arithmetic number, because the mean of its divisors is an integer number (63146057208).

Almost surely, 2^221011200221 is an apocalyptic number.

It is an amenable number.

221011200221 is a deficient number, since it is larger than the sum of its proper divisors (31573028611).

221011200221 is an equidigital number, since it uses as much as digits as its factorization.

221011200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31573028610.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221011200221 its reverse (122002110122), we get a palindrome (343013310343).

Subtracting from 221011200221 its reverse (122002110122), we obtain a palindrome (99009090099).

The spelling of 221011200221 in words is "two hundred twenty-one billion, eleven million, two hundred thousand, two hundred twenty-one".