221122110221 has 4 divisors (see below), whose sum is σ = 221419718112. Its totient is φ = 220824502332.

The previous prime is 221122110161. The next prime is 221122110229. The reversal of 221122110221 is 122011221122.

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 221122110221 - 2³⁴ = 203942241037 is a prime.

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 221122110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122110229) 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, 148802831 + ... + 148804316.

It is an arithmetic number, because the mean of its divisors is an integer number (55354929528).

Almost surely, 2^221122110221 is an apocalyptic number.

It is an amenable number.

221122110221 is a deficient number, since it is larger than the sum of its proper divisors (297607891).

221122110221 is an equidigital number, since it uses as much as digits as its factorization.

221122110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297607890.

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

Adding to 221122110221 its reverse (122011221122), we get a palindrome (343133331343).

The spelling of 221122110221 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred ten thousand, two hundred twenty-one".