221111102122201 has 16 divisors (see below), whose sum is σ = 234349087714560. Its totient is φ = 207898851316480.

The previous prime is 221111102122187. The next prime is 221111102122219. The reversal of 221111102122201 is 102221201111122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221111102122201 - 2³¹ = 221108954638553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221111102122241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407707920 + ... + 408249886.

It is an arithmetic number, because the mean of its divisors is an integer number (14646817982160).

Almost surely, 2^{221111102122201} is an apocalyptic number.

It is an amenable number.

221111102122201 is a deficient number, since it is larger than the sum of its proper divisors (13237985592359).

221111102122201 is a wasteful number, since it uses less digits than its factorization.

221111102122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565664.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221111102122201 its reverse (102221201111122), we get a palindrome (323332303233323).

The spelling of 221111102122201 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred two million, one hundred twenty-two thousand, two hundred one".