11011112020 has 24 divisors (see below), whose sum is σ = 23125317768. Its totient is φ = 4404067200.

The previous prime is 11011111999. The next prime is 11011112029. The reversal of 11011112020 is 2021111011.

It can be written as a sum of positive squares in 4 ways, for example, as 5416371216 + 5594740804 = 73596^2 + 74798^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11011111988 and 11011112006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011112029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408150 + ... + 434290.

It is an arithmetic number, because the mean of its divisors is an integer number (963554907).

Almost surely, 2^11011112020 is an apocalyptic number.

11011112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011112020 is an abundant number, since it is smaller than the sum of its proper divisors (12114205748).

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

11011112020 is a wasteful number, since it uses less digits than its factorization.

11011112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47211 (or 47209 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11011112020 its reverse (2021111011), we get a palindrome (13032223031).

The spelling of 11011112020 in words is "eleven billion, eleven million, one hundred twelve thousand, twenty".