221121022111 has 8 divisors (see below), whose sum is σ = 241311879504. Its totient is φ = 200944989120.

The previous prime is 221121022097. The next prime is 221121022123. The reversal of 221121022111 is 111220121122.

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 221121022111 - 2¹⁵ = 221120989343 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 (221121022141) 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 7 ways as a sum of consecutive naturals, for example, 3674896 + ... + 3734581.

It is an arithmetic number, because the mean of its divisors is an integer number (30163984938).

Almost surely, 2^221121022111 is an apocalyptic number.

221121022111 is a deficient number, since it is larger than the sum of its proper divisors (20190857393).

221121022111 is a wasteful number, since it uses less digits than its factorization.

221121022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7412201.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221121022111 its reverse (111220121122), we get a palindrome (332341143233).

The spelling of 221121022111 in words is "two hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, one hundred eleven".