1111200520 has 16 divisors (see below), whose sum is σ = 2500201260. Its totient is φ = 444480192.

The previous prime is 1111200473. The next prime is 1111200521. The reversal of 1111200520 is 250021111.

1111200520 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1066283716 + 44916804 = 32654^2 + 6702^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1111200520.

It is not an unprimeable number, because it can be changed into a prime (1111200521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13889967 + ... + 13890046.

Almost surely, 2^1111200520 is an apocalyptic number.

1111200520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111200520 is an abundant number, since it is smaller than the sum of its proper divisors (1389000740).

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

1111200520 is a wasteful number, since it uses less digits than its factorization.

1111200520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27780024 (or 27780020 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 1111200520 is about 33334.6744396882. The cubic root of 1111200520 is about 1035.7719493267.

Adding to 1111200520 its reverse (250021111), we get a palindrome (1361221631).

The spelling of 1111200520 in words is "one billion, one hundred eleven million, two hundred thousand, five hundred twenty".