11031123020 has 48 divisors (see below), whose sum is σ = 23809332288. Its totient is φ = 4289967360.

The previous prime is 11031122981. The next prime is 11031123023. The reversal of 11031123020 is 2032113011.

It is a junction number, because it is equal to n+sod(n) for n = 11031122986 and 11031123004.

It is not an unprimeable number, because it can be changed into a prime (11031123023) 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, 1136990 + ... + 1146650.

It is an arithmetic number, because the mean of its divisors is an integer number (496027756).

Almost surely, 2^11031123020 is an apocalyptic number.

11031123020 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 11031123020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11904666144).

11031123020 is an abundant number, since it is smaller than the sum of its proper divisors (12778209268).

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

11031123020 is a wasteful number, since it uses less digits than its factorization.

11031123020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11250 (or 11248 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 11031123020 its reverse (2032113011), we get a palindrome (13063236031).

It can be divided in two parts, 110311 and 23020, that added together give a palindrome (133331).

The spelling of 11031123020 in words is "eleven billion, thirty-one million, one hundred twenty-three thousand, twenty".