111201220120020 has 24 divisors (see below), whose sum is σ = 311363416336224. Its totient is φ = 29653658698656.

The previous prime is 111201220120013. The next prime is 111201220120021. The reversal of 111201220120020 is 20021022102111.

It is a super-2 number, since 2×111201220120020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111201220120021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926676834274 + ... + 926676834393.

It is an arithmetic number, because the mean of its divisors is an integer number (12973475680676).

Almost surely, 2^{111201220120020} is an apocalyptic number.

111201220120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201220120020 is an abundant number, since it is smaller than the sum of its proper divisors (200162196216204).

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

111201220120020 is a wasteful number, since it uses less digits than its factorization.

111201220120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853353668679 (or 1853353668677 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111201220120020 its reverse (20021022102111), we get a palindrome (131222242222131).

The spelling of 111201220120020 in words is "one hundred eleven trillion, two hundred one billion, two hundred twenty million, one hundred twenty thousand, twenty".