221111121104 has 10 divisors (see below), whose sum is σ = 428402797170. Its totient is φ = 110555560544.

The previous prime is 221111121103. The next prime is 221111121157. The reversal of 221111121104 is 401121111122.

221111121104 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 116109199504 + 105001921600 = 340748^2 + 324040^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111121103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6909722519 + ... + 6909722550.

It is an arithmetic number, because the mean of its divisors is an integer number (42840279717).

Almost surely, 2^221111121104 is an apocalyptic number.

It is an amenable number.

221111121104 is a deficient number, since it is larger than the sum of its proper divisors (207291676066).

221111121104 is a wasteful number, since it uses less digits than its factorization.

221111121104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13819445077 (or 13819445071 counting only the distinct ones).

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

Adding to 221111121104 its reverse (401121111122), we get a palindrome (622232232226).

The spelling of 221111121104 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred four".