1213123230 has 160 divisors (see below), whose sum is σ = 3768288480. Its totient is φ = 276756480.

The previous prime is 1213123207. The next prime is 1213123259. The reversal of 1213123230 is 323213121.

1213123230 is a `hidden beast` number, since 121 + 312 + 3 + 230 = 666.

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 polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 147466 + ... + 155474.

It is an arithmetic number, because the mean of its divisors is an integer number (23551803).

Almost surely, 2^1213123230 is an apocalyptic number.

1213123230 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 1213123230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1884144240).

1213123230 is an abundant number, since it is smaller than the sum of its proper divisors (2555165250).

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

1213123230 is a wasteful number, since it uses less digits than its factorization.

1213123230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8056 (or 8047 counting only the distinct ones).

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

The square root of 1213123230 is about 34829.9186045561. The cubic root of 1213123230 is about 1066.5182867606.

Adding to 1213123230 its reverse (323213121), we get a palindrome (1536336351).

The spelling of 1213123230 in words is "one billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred thirty".