111201111020 has 48 divisors (see below), whose sum is σ = 239287347936. Its totient is φ = 43382976000.

The previous prime is 111201111017. The next prime is 111201111023. The reversal of 111201111020 is 20111102111.

It is an interprime number because it is at equal distance from previous prime (111201111017) and next prime (111201111023).

It is a junction number, because it is equal to n+sod(n) for n = 111201110992 and 111201111010.

It is not an unprimeable number, because it can be changed into a prime (111201111023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3115475 + ... + 3150965.

It is an arithmetic number, because the mean of its divisors is an integer number (4985153082).

Almost surely, 2^111201111020 is an apocalyptic number.

111201111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201111020 is an abundant number, since it is smaller than the sum of its proper divisors (128086236916).

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

111201111020 is a wasteful number, since it uses less digits than its factorization.

111201111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39362 (or 39360 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111201111020 its reverse (20111102111), we get a palindrome (131312213131).

The spelling of 111201111020 in words is "one hundred eleven billion, two hundred one million, one hundred eleven thousand, twenty".