111211003020 has 48 divisors (see below), whose sum is σ = 335343949920. Its totient is φ = 27375015936.

The previous prime is 111211003009. The next prime is 111211003027. The reversal of 111211003020 is 20300112111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111211002987 and 111211003005.

It is not an unprimeable number, because it can be changed into a prime (111211003027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71288325 + ... + 71289884.

It is an arithmetic number, because the mean of its divisors is an integer number (6986332290).

Almost surely, 2^111211003020 is an apocalyptic number.

111211003020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211003020 is an abundant number, since it is smaller than the sum of its proper divisors (224132946900).

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

111211003020 is a wasteful number, since it uses less digits than its factorization.

111211003020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142578234 (or 142578232 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 111211003020 its reverse (20300112111), we get a palindrome (131511115131).

The spelling of 111211003020 in words is "one hundred eleven billion, two hundred eleven million, three thousand, twenty".