22112111120021 has 4 divisors (see below), whose sum is σ = 23813042744652. Its totient is φ = 20411179495392.

The previous prime is 22112111120009. The next prime is 22112111120023. The reversal of 22112111120021 is 12002111121122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9493879713796 + 12618231406225 = 3081214^2 + 3552215^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112111120021 - 2¹⁰ = 22112111118997 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 (22112111120023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 850465812296 + ... + 850465812321.

It is an arithmetic number, because the mean of its divisors is an integer number (5953260686163).

Almost surely, 2^{22112111120021} is an apocalyptic number.

It is an amenable number.

22112111120021 is a deficient number, since it is larger than the sum of its proper divisors (1700931624631).

22112111120021 is a wasteful number, since it uses less digits than its factorization.

22112111120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700931624630.

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

Adding to 22112111120021 its reverse (12002111121122), we get a palindrome (34114222241143).

The spelling of 22112111120021 in words is "twenty-two trillion, one hundred twelve billion, one hundred eleven million, one hundred twenty thousand, twenty-one".