111021220020112 has 20 divisors (see below), whose sum is σ = 222520979782620. Its totient is φ = 53596451043968.

The previous prime is 111021220020037. The next prime is 111021220020119. The reversal of 111021220020112 is 211020022120111.

It can be written as a sum of positive squares in 2 ways, for example, as 91486623338496 + 19534596681616 = 9564864^2 + 4419796^2 .

It is a super-2 number, since 2×111021220020112² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (111021220020119) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 119634934903 + ... + 119634935830.

It is an arithmetic number, because the mean of its divisors is an integer number (11126048989131).

Almost surely, 2^{111021220020112} is an apocalyptic number.

It is an amenable number.

111021220020112 is an abundant number, since it is smaller than the sum of its proper divisors (111499759762508).

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

111021220020112 is a wasteful number, since it uses less digits than its factorization.

111021220020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239269870770 (or 239269870764 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111021220020112 its reverse (211020022120111), we get a palindrome (322041242140223).

The spelling of 111021220020112 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty million, twenty thousand, one hundred twelve".