11011031020 has 48 divisors (see below), whose sum is σ = 25233205536. Its totient is φ = 4002752000.

The previous prime is 11011030999. The next prime is 11011031023. The reversal of 11011031020 is 2013011011.

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 = 11011030988 and 11011031006.

It is not an unprimeable number, because it can be changed into a prime (11011031023) 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, 966960 + ... + 978280.

It is an arithmetic number, because the mean of its divisors is an integer number (525691782).

Almost surely, 2^11011031020 is an apocalyptic number.

11011031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11011031020 is an abundant number, since it is smaller than the sum of its proper divisors (14222174516).

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

11011031020 is a wasteful number, since it uses less digits than its factorization.

11011031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15762 (or 15760 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 11011031020 its reverse (2013011011), we get a palindrome (13024042031).

The spelling of 11011031020 in words is "eleven billion, eleven million, thirty-one thousand, twenty".