111222212200020 has 36 divisors (see below), whose sum is σ = 337374043673940. Its totient is φ = 29659256586624.

The previous prime is 111222212200019. The next prime is 111222212200133. The reversal of 111222212200020 is 20002212222111.

It is a happy number.

111222212200020 is a `hidden beast` number, since 1 + 11 + 222 + 212 + 200 + 0 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 43026095687184 + 68196116512836 = 6559428^2 + 8258094^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 111222212199966 and 111222212200002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308950589265 + ... + 308950589624.

It is an arithmetic number, because the mean of its divisors is an integer number (9371501213165).

Almost surely, 2^{111222212200020} is an apocalyptic number.

111222212200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222212200020 is an abundant number, since it is smaller than the sum of its proper divisors (226151831473920).

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

111222212200020 is a wasteful number, since it uses less digits than its factorization.

111222212200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617901178904 (or 617901178899 counting only the distinct ones).

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

Adding to 111222212200020 its reverse (20002212222111), we get a palindrome (131224424422131).

The spelling of 111222212200020 in words is "one hundred eleven trillion, two hundred twenty-two billion, two hundred twelve million, two hundred thousand, twenty".