11013121500 has 48 divisors (see below), whose sum is σ = 32070214176. Its totient is φ = 2936832000.

The previous prime is 11013121489. The next prime is 11013121573. The reversal of 11013121500 is 512131011.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11013121500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3669541 + ... + 3672540.

It is an arithmetic number, because the mean of its divisors is an integer number (668129462).

Almost surely, 2^11013121500 is an apocalyptic number.

11013121500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11013121500 is an abundant number, since it is smaller than the sum of its proper divisors (21057092676).

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

11013121500 is a wasteful number, since it uses less digits than its factorization.

11013121500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7342103 (or 7342091 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 15.

Adding to 11013121500 its reverse (512131011), we get a palindrome (11525252511).

The spelling of 11013121500 in words is "eleven billion, thirteen million, one hundred twenty-one thousand, five hundred".