221102211022221 has 16 divisors (see below), whose sum is σ = 302771140803648. Its totient is φ = 143417391984000.

The previous prime is 221102211022183. The next prime is 221102211022229. The reversal of 221102211022221 is 122220112201122.

It is not a de Polignac number, because 221102211022221 - 2¹⁸ = 221102210760077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102211022229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74716906 + ... + 77619716.

It is an arithmetic number, because the mean of its divisors is an integer number (18923196300228).

Almost surely, 2^{221102211022221} is an apocalyptic number.

It is an amenable number.

221102211022221 is a deficient number, since it is larger than the sum of its proper divisors (81668929781427).

221102211022221 is a wasteful number, since it uses less digits than its factorization.

221102211022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589052.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221102211022221 its reverse (122220112201122), we get a palindrome (343322323223343).

The spelling of 221102211022221 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred eleven million, twenty-two thousand, two hundred twenty-one".