111822121773 has 72 divisors (see below), whose sum is σ = 173616162720. Its totient is φ = 69335585280.

The previous prime is 111822121771. The next prime is 111822121777. The reversal of 111822121773 is 377121228111.

It is a happy number.

It is not a de Polignac number, because 111822121773 - 2¹ = 111822121771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111822121771) 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 71 ways as a sum of consecutive naturals, for example, 104603883 + ... + 104604951.

Almost surely, 2^111822121773 is an apocalyptic number.

It is an amenable number.

111822121773 is a deficient number, since it is larger than the sum of its proper divisors (61794040947).

111822121773 is a wasteful number, since it uses less digits than its factorization.

111822121773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547 (or 1527 counting only the distinct ones).

The product of its digits is 9408, while the sum is 36.

Adding to 111822121773 its reverse (377121228111), we get a palindrome (488943349884).

The spelling of 111822121773 in words is "one hundred eleven billion, eight hundred twenty-two million, one hundred twenty-one thousand, seven hundred seventy-three".