22020121111 has 4 divisors (see below), whose sum is σ = 22020464872. Its totient is φ = 22019777352.

The previous prime is 22020121093. The next prime is 22020121127. The reversal of 22020121111 is 11112102022.

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 22020121111 - 2²¹ = 22018023959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22020121091 and 22020121100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22020121411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44160 + ... + 214453.

It is an arithmetic number, because the mean of its divisors is an integer number (5505116218).

Almost surely, 2^22020121111 is an apocalyptic number.

22020121111 is a deficient number, since it is larger than the sum of its proper divisors (343761).

22020121111 is an equidigital number, since it uses as much as digits as its factorization.

22020121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343760.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22020121111 its reverse (11112102022), we get a palindrome (33132223133).

The spelling of 22020121111 in words is "twenty-two billion, twenty million, one hundred twenty-one thousand, one hundred eleven".