111010012020 has 144 divisors (see below), whose sum is σ = 339515904000. Its totient is φ = 29358256896.

The previous prime is 111010012013. The next prime is 111010012039. The reversal of 111010012020 is 20210010111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111010011993 and 111010012011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31998846 + ... + 32002314.

Almost surely, 2^111010012020 is an apocalyptic number.

111010012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111010012020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169757952000).

111010012020 is an abundant number, since it is smaller than the sum of its proper divisors (228505891980).

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

111010012020 is a wasteful number, since it uses less digits than its factorization.

111010012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4902 (or 4897 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111010012020 its reverse (20210010111), we get a palindrome (131220022131).

The spelling of 111010012020 in words is "one hundred eleven billion, ten million, twelve thousand, twenty".