1131302120 has 64 divisors (see below), whose sum is σ = 2776032000. Its totient is φ = 412409088.

The previous prime is 1131302087. The next prime is 1131302147. The reversal of 1131302120 is 212031311.

It is a junction number, because it is equal to n+sod(n) for n = 1131302095 and 1131302104.

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, 27311 + ... + 54849.

It is an arithmetic number, because the mean of its divisors is an integer number (43375500).

Almost surely, 2^1131302120 is an apocalyptic number.

1131302120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131302120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1388016000).

1131302120 is an abundant number, since it is smaller than the sum of its proper divisors (1644729880).

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

1131302120 is a wasteful number, since it uses less digits than its factorization.

1131302120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27642 (or 27638 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1131302120 is about 33634.8349185781. The cubic root of 1131302120 is about 1041.9803612309.

Adding to 1131302120 its reverse (212031311), we get a palindrome (1343333431).

The spelling of 1131302120 in words is "one billion, one hundred thirty-one million, three hundred two thousand, one hundred twenty".