221120021222111 has 4 divisors (see below), whose sum is σ = 241221841333224. Its totient is φ = 201018201111000.

The previous prime is 221120021222063. The next prime is 221120021222167. The reversal of 221120021222111 is 111222120021122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221120021222111 - 2¹⁸ = 221120020959967 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 (221120021222171) 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, 10050910055540 + ... + 10050910055561.

It is an arithmetic number, because the mean of its divisors is an integer number (60305460333306).

Almost surely, 2^{221120021222111} is an apocalyptic number.

221120021222111 is a deficient number, since it is larger than the sum of its proper divisors (20101820111113).

221120021222111 is a wasteful number, since it uses less digits than its factorization.

221120021222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20101820111112.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221120021222111 its reverse (111222120021122), we get a palindrome (332342141243233).

The spelling of 221120021222111 in words is "two hundred twenty-one trillion, one hundred twenty billion, twenty-one million, two hundred twenty-two thousand, one hundred eleven".