1231131130 has 32 divisors (see below), whose sum is σ = 2251655424. Its totient is φ = 484569216.

The previous prime is 1231131127. The next prime is 1231131137. The reversal of 1231131130 is 311311321.

It is not an unprimeable number, because it can be changed into a prime (1231131137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353779 + ... + 357241.

It is an arithmetic number, because the mean of its divisors is an integer number (70364232).

Almost surely, 2^1231131130 is an apocalyptic number.

1231131130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231131130 is a deficient number, since it is larger than the sum of its proper divisors (1020524294).

1231131130 is a wasteful number, since it uses less digits than its factorization.

1231131130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1231131130 is about 35087.4782507948. The cubic root of 1231131130 is about 1071.7696079146.

Adding to 1231131130 its reverse (311311321), we get a palindrome (1542442451).

The spelling of 1231131130 in words is "one billion, two hundred thirty-one million, one hundred thirty-one thousand, one hundred thirty".