221102220202221 has 8 divisors (see below), whose sum is σ = 294833884776480. Its totient is φ = 147386017881392.

The previous prime is 221102220202181. The next prime is 221102220202349. The reversal of 221102220202221 is 122202022201122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221102220202221 - 2¹³ = 221102220194029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102220204221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3865529991 + ... + 3865587188.

It is an arithmetic number, because the mean of its divisors is an integer number (36854235597060).

Almost surely, 2^{221102220202221} is an apocalyptic number.

It is an amenable number.

221102220202221 is a deficient number, since it is larger than the sum of its proper divisors (73731664574259).

221102220202221 is an equidigital number, since it uses as much as digits as its factorization.

221102220202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7731126715.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221102220202221 its reverse (122202022201122), we get a palindrome (343304242403343).

The spelling of 221102220202221 in words is "two hundred twenty-one trillion, one hundred two billion, two hundred twenty million, two hundred two thousand, two hundred twenty-one".