11031121320 has 32 divisors (see below), whose sum is σ = 33093364320. Its totient is φ = 2941632320.

The previous prime is 11031121261. The next prime is 11031121337. The reversal of 11031121320 is 2312113011.

It is a happy number.

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 11031121320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45962886 + ... + 45963125.

It is an arithmetic number, because the mean of its divisors is an integer number (1034167635).

Almost surely, 2^11031121320 is an apocalyptic number.

11031121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11031121320 is an abundant number, since it is smaller than the sum of its proper divisors (22062243000).

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

11031121320 is a wasteful number, since it uses less digits than its factorization.

11031121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91926025 (or 91926021 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11031121320 its reverse (2312113011), we get a palindrome (13343234331).

The spelling of 11031121320 in words is "eleven billion, thirty-one million, one hundred twenty-one thousand, three hundred twenty".