1121155560 has 128 divisors (see below), whose sum is σ = 4271097600. Its totient is φ = 256262400.

The previous prime is 1121155547. The next prime is 1121155571. The reversal of 1121155560 is 655511211.

1121155560 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66591 + ... + 81710.

It is an arithmetic number, because the mean of its divisors is an integer number (33367950).

Almost surely, 2^1121155560 is an apocalyptic number.

1121155560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121155560 is an abundant number, since it is smaller than the sum of its proper divisors (3149942040).

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

1121155560 is a wasteful number, since it uses less digits than its factorization.

1121155560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148328 (or 148318 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The square root of 1121155560 is about 33483.6610901496. The cubic root of 1121155560 is about 1038.8558546610.

Adding to 1121155560 its reverse (655511211), we get a palindrome (1776666771).

The spelling of 1121155560 in words is "one billion, one hundred twenty-one million, one hundred fifty-five thousand, five hundred sixty".