22121220111 has 8 divisors (see below), whose sum is σ = 29604607920. Its totient is φ = 14692656192.

The previous prime is 22121220109. The next prime is 22121220113. The reversal of 22121220111 is 11102212122.

It is an interprime number because it is at equal distance from previous prime (22121220109) and next prime (22121220113).

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

It is not a de Polignac number, because 22121220111 - 2¹ = 22121220109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121220113) 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, 13705030 + ... + 13706643.

It is an arithmetic number, because the mean of its divisors is an integer number (3700575990).

Almost surely, 2^22121220111 is an apocalyptic number.

22121220111 is a deficient number, since it is larger than the sum of its proper divisors (7483387809).

22121220111 is a wasteful number, since it uses less digits than its factorization.

22121220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27411945.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22121220111 its reverse (11102212122), we get a palindrome (33223432233).

The spelling of 22121220111 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty thousand, one hundred eleven".