111111120200020 has 24 divisors (see below), whose sum is σ = 247058843739624. Its totient is φ = 41830068781056.

The previous prime is 111111120200011. The next prime is 111111120200039. The reversal of 111111120200020 is 20002021111111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8507267225284 + 102603852974736 = 2916722^2 + 10129356^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163398705837 + ... + 163398706516.

It is an arithmetic number, because the mean of its divisors is an integer number (10294118489151).

Almost surely, 2^{111111120200020} is an apocalyptic number.

111111120200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111120200020 is an abundant number, since it is smaller than the sum of its proper divisors (135947723539604).

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

111111120200020 is a wasteful number, since it uses less digits than its factorization.

111111120200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326797412379 (or 326797412377 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111111120200020 its reverse (20002021111111), we get a palindrome (131113141311131).

The spelling of 111111120200020 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty million, two hundred thousand, twenty".