221022010221 has 4 divisors (see below), whose sum is σ = 294696013632. Its totient is φ = 147348006812.

The previous prime is 221022010219. The next prime is 221022010271. The reversal of 221022010221 is 122010220122.

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 221022010221 - 2¹ = 221022010219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221022010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022010211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36837001701 + ... + 36837001706.

It is an arithmetic number, because the mean of its divisors is an integer number (73674003408).

Almost surely, 2^221022010221 is an apocalyptic number.

It is an amenable number.

221022010221 is a deficient number, since it is larger than the sum of its proper divisors (73674003411).

221022010221 is an equidigital number, since it uses as much as digits as its factorization.

221022010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73674003410.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221022010221 its reverse (122010220122), we get a palindrome (343032230343).

The spelling of 221022010221 in words is "two hundred twenty-one billion, twenty-two million, ten thousand, two hundred twenty-one".