1231015130 has 32 divisors (see below), whose sum is σ = 2362003200. Its totient is φ = 460579392.

The previous prime is 1231015129. The next prime is 1231015139. The reversal of 1231015130 is 315101321.

It is a junction number, because it is equal to n+sod(n) for n = 1231015099 and 1231015108.

It is not an unprimeable number, because it can be changed into a prime (1231015139) 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, 25997 + ... + 56016.

It is an arithmetic number, because the mean of its divisors is an integer number (73812600).

Almost surely, 2^1231015130 is an apocalyptic number.

1231015130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231015130 is a deficient number, since it is larger than the sum of its proper divisors (1130988070).

1231015130 is a wasteful number, since it uses less digits than its factorization.

1231015130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82118.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1231015130 is about 35085.8252004994. The cubic root of 1231015130 is about 1071.7359453268.

Adding to 1231015130 its reverse (315101321), we get a palindrome (1546116451).

The spelling of 1231015130 in words is "one billion, two hundred thirty-one million, fifteen thousand, one hundred thirty".