111222022120020 has 72 divisors (see below), whose sum is σ = 385569676687104. Its totient is φ = 25422176484288.

The previous prime is 111222022120019. The next prime is 111222022120037. The reversal of 111222022120020 is 20021220222111.

It is a happy number.

111222022120020 is a `hidden beast` number, since 1 + 1 + 1 + 2 + 220 + 221 + 200 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 111222022119975 and 111222022120002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44135721804 + ... + 44135724323.

It is an arithmetic number, because the mean of its divisors is an integer number (5355134398432).

Almost surely, 2^{111222022120020} is an apocalyptic number.

111222022120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222022120020 is an abundant number, since it is smaller than the sum of its proper divisors (274347654567084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111222022120020 is a wasteful number, since it uses less digits than its factorization.

111222022120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88271446149 (or 88271446144 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 111222022120020 its reverse (20021220222111), we get a palindrome (131243242342131).

The spelling of 111222022120020 in words is "one hundred eleven trillion, two hundred twenty-two billion, twenty-two million, one hundred twenty thousand, twenty".