221212102202201 has 4 divisors (see below), whose sum is σ = 241322293311504. Its totient is φ = 201101911092900.

The previous prime is 221212102202191. The next prime is 221212102202213. The reversal of 221212102202201 is 102202201212122.

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 221212102202201 - 2¹⁰ = 221212102201177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221212102204201) 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, 10055095554635 + ... + 10055095554656.

It is an arithmetic number, because the mean of its divisors is an integer number (60330573327876).

Almost surely, 2^{221212102202201} is an apocalyptic number.

It is an amenable number.

221212102202201 is a deficient number, since it is larger than the sum of its proper divisors (20110191109303).

221212102202201 is a wasteful number, since it uses less digits than its factorization.

221212102202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20110191109302.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221212102202201 its reverse (102202201212122), we get a palindrome (323414303414323).

The spelling of 221212102202201 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred two million, two hundred two thousand, two hundred one".