22121204111 has 8 divisors (see below), whose sum is σ = 22228869600. Its totient is φ = 22013792352.

The previous prime is 22121204087. The next prime is 22121204113. The reversal of 22121204111 is 11140212122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121204111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22121204111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121204113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112541 + ... + 238553.

It is an arithmetic number, because the mean of its divisors is an integer number (2778608700).

Almost surely, 2^22121204111 is an apocalyptic number.

22121204111 is a deficient number, since it is larger than the sum of its proper divisors (107665489).

22121204111 is a wasteful number, since it uses less digits than its factorization.

22121204111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126865.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22121204111 its reverse (11140212122), we get a palindrome (33261416233).

The spelling of 22121204111 in words is "twenty-two billion, one hundred twenty-one million, two hundred four thousand, one hundred eleven".