1131388012 has 24 divisors (see below), whose sum is σ = 2131935120. Its totient is φ = 523392000.

The previous prime is 1131387949. The next prime is 1131388019. The reversal of 1131388012 is 2108831311.

It is not an unprimeable number, because it can be changed into a prime (1131388019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136989 + ... + 145012.

It is an arithmetic number, because the mean of its divisors is an integer number (88830630).

Almost surely, 2^1131388012 is an apocalyptic number.

It is an amenable number.

1131388012 is a deficient number, since it is larger than the sum of its proper divisors (1000547108).

1131388012 is a wasteful number, since it uses less digits than its factorization.

1131388012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282081 (or 282079 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 1131388012 is about 33636.1117253466. Note that the first 3 decimals coincide. The cubic root of 1131388012 is about 1042.0067307010.

The spelling of 1131388012 in words is "one billion, one hundred thirty-one million, three hundred eighty-eight thousand, twelve".