9111112020 has 36 divisors (see below), whose sum is σ = 27637040340. Its totient is φ = 2429629824.

The previous prime is 9111111973. The next prime is 9111112037. The reversal of 9111112020 is 202111119.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5778128196 + 3332983824 = 76014^2 + 57732^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 9111111984 and 9111112002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25308465 + ... + 25308824.

It is an arithmetic number, because the mean of its divisors is an integer number (767695565).

Almost surely, 2^9111112020 is an apocalyptic number.

9111112020 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9111112020 is an abundant number, since it is smaller than the sum of its proper divisors (18525928320).

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

9111112020 is a wasteful number, since it uses less digits than its factorization.

9111112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50617304 (or 50617299 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 9111112020 is about 95452.1451828088. The cubic root of 9111112020 is about 2088.6089214699.

Adding to 9111112020 its reverse (202111119), we get a palindrome (9313223139).

The spelling of 9111112020 in words is "nine billion, one hundred eleven million, one hundred twelve thousand, twenty".