11121031320 has 64 divisors (see below), whose sum is σ = 38129253120. Its totient is φ = 2541949824.

The previous prime is 11121031319. The next prime is 11121031349. The reversal of 11121031320 is 2313012111.

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 11121031320.

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, 6618822 + ... + 6620501.

It is an arithmetic number, because the mean of its divisors is an integer number (595769580).

Almost surely, 2^11121031320 is an apocalyptic number.

11121031320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11121031320 is an abundant number, since it is smaller than the sum of its proper divisors (27008221800).

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

11121031320 is a wasteful number, since it uses less digits than its factorization.

11121031320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13239344 (or 13239340 counting only the distinct ones).

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

Adding to 11121031320 its reverse (2313012111), we get a palindrome (13434043431).

The spelling of 11121031320 in words is "eleven billion, one hundred twenty-one million, thirty-one thousand, three hundred twenty".