221111102012221 has 8 divisors (see below), whose sum is σ = 226265840852480. Its totient is φ = 215956936816992.

The previous prime is 221111102012179. The next prime is 221111102012341. The reversal of 221111102012221 is 122210201111122.

It is a happy number.

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 221111102012221 - 2¹⁹ = 221111101487933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111102012621) 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, 142631325 + ... + 144173218.

It is an arithmetic number, because the mean of its divisors is an integer number (28283230106560).

Almost surely, 2^{221111102012221} is an apocalyptic number.

It is an amenable number.

221111102012221 is a deficient number, since it is larger than the sum of its proper divisors (5154738840259).

221111102012221 is a wasteful number, since it uses less digits than its factorization.

221111102012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286822515.

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

Adding to 221111102012221 its reverse (122210201111122), we get a palindrome (343321303123343).

The spelling of 221111102012221 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred two million, twelve thousand, two hundred twenty-one".