1231130000 has 50 divisors (see below), whose sum is σ = 2980713054. Its totient is φ = 492448000.

The previous prime is 1231129883. The next prime is 1231130051. The reversal of 1231130000 is 311321.

It can be written as a sum of positive squares in 5 ways, for example, as 216325264 + 1014804736 = 14708^2 + 31856^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 51557 + ... + 71556.

Almost surely, 2^1231130000 is an apocalyptic number.

1231130000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231130000 is an abundant number, since it is smaller than the sum of its proper divisors (1749583054).

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

1231130000 is an equidigital number, since it uses as much as digits as its factorization.

1231130000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123141 (or 123120 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1231130000 is about 35087.4621481805. The cubic root of 1231130000 is about 1071.7692800048.

Adding to 1231130000 its reverse (311321), we get a palindrome (1231441321).

The spelling of 1231130000 in words is "one billion, two hundred thirty-one million, one hundred thirty thousand".