221111102201201 has 4 divisors (see below), whose sum is σ = 223775091384432. Its totient is φ = 218447113017972.

The previous prime is 221111102201159. The next prime is 221111102201221. The reversal of 221111102201201 is 102102201111122.

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 a de Polignac number, because none of the positive numbers 2^k-221111102201201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221111102201201.

It is not an unprimeable number, because it can be changed into a prime (221111102201221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1331994591491 + ... + 1331994591656.

It is an arithmetic number, because the mean of its divisors is an integer number (55943772846108).

Almost surely, 2^{221111102201201} is an apocalyptic number.

It is an amenable number.

221111102201201 is a deficient number, since it is larger than the sum of its proper divisors (2663989183231).

221111102201201 is an equidigital number, since it uses as much as digits as its factorization.

221111102201201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663989183230.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221111102201201 its reverse (102102201111122), we get a palindrome (323213303312323).

The spelling of 221111102201201 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred two million, two hundred one thousand, two hundred one".