1231213230 has 256 divisors, whose sum is σ = 3750727680. Its totient is φ = 285120000.

The previous prime is 1231213229. The next prime is 1231213259. The reversal of 1231213230 is 323121321.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8153655 + ... + 8153805.

It is an arithmetic number, because the mean of its divisors is an integer number (14651280).

Almost surely, 2^1231213230 is an apocalyptic number.

1231213230 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 1231213230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1875363840).

1231213230 is an abundant number, since it is smaller than the sum of its proper divisors (2519514450).

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

1231213230 is a wasteful number, since it uses less digits than its factorization.

1231213230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 298 counting only the distinct ones).

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

The square root of 1231213230 is about 35088.6481643280. The cubic root of 1231213230 is about 1071.7934316235.

Adding to 1231213230 its reverse (323121321), we get a palindrome (1554334551).

The spelling of 1231213230 in words is "one billion, two hundred thirty-one million, two hundred thirteen thousand, two hundred thirty".