1101112020 has 144 divisors (see below), whose sum is σ = 3505057920. Its totient is φ = 279417600.

The previous prime is 1101112013. The next prime is 1101112021. The reversal of 1101112020 is 202111011.

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 = 1101111993 and 1101112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101112021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 369135 + ... + 372105.

It is an arithmetic number, because the mean of its divisors is an integer number (24340680).

Almost surely, 2^1101112020 is an apocalyptic number.

1101112020 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 1101112020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1752528960).

1101112020 is an abundant number, since it is smaller than the sum of its proper divisors (2403945900).

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

1101112020 is a wasteful number, since it uses less digits than its factorization.

1101112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086 (or 3081 counting only the distinct ones).

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

The square root of 1101112020 is about 33183.0080010839. The cubic root of 1101112020 is about 1032.6278516779.

Adding to 1101112020 its reverse (202111011), we get a palindrome (1303223031).

The spelling of 1101112020 in words is "one billion, one hundred one million, one hundred twelve thousand, twenty".