1131235120 has 20 divisors (see below), whose sum is σ = 2630121840. Its totient is φ = 452494016.

The previous prime is 1131235109. The next prime is 1131235177. The reversal of 1131235120 is 215321311.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7070140 + ... + 7070299.

It is an arithmetic number, because the mean of its divisors is an integer number (131506092).

Almost surely, 2^1131235120 is an apocalyptic number.

1131235120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131235120 is an abundant number, since it is smaller than the sum of its proper divisors (1498886720).

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

1131235120 is a wasteful number, since it uses less digits than its factorization.

1131235120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14140452 (or 14140446 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1131235120 is about 33633.8389126189. The cubic root of 1131235120 is about 1041.9597908158.

Adding to 1131235120 its reverse (215321311), we get a palindrome (1346556431).

The spelling of 1131235120 in words is "one billion, one hundred thirty-one million, two hundred thirty-five thousand, one hundred twenty".