1312123230 has 192 divisors, whose sum is σ = 3868233408. Its totient is φ = 305786880.

The previous prime is 1312123213. The next prime is 1312123247. The reversal of 1312123230 is 323212131.

1312123230 is a `hidden beast` number, since 1 + 312 + 123 + 230 = 666.

It is an interprime number because it is at equal distance from previous prime (1312123213) and next prime (1312123247).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 4139032 + ... + 4139348.

It is an arithmetic number, because the mean of its divisors is an integer number (20147049).

Almost surely, 2^1312123230 is an apocalyptic number.

1312123230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312123230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934116704).

1312123230 is an abundant number, since it is smaller than the sum of its proper divisors (2556110178).

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

1312123230 is a wasteful number, since it uses less digits than its factorization.

1312123230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1312123230 is about 36223.2415722282. The cubic root of 1312123230 is about 1094.7750085058.

Adding to 1312123230 its reverse (323212131), we get a palindrome (1635335361).

The spelling of 1312123230 in words is "one billion, three hundred twelve million, one hundred twenty-three thousand, two hundred thirty".