1321312230 has 128 divisors (see below), whose sum is σ = 4052505600. Its totient is φ = 300091392.

The previous prime is 1321312219. The next prime is 1321312247. The reversal of 1321312230 is 322131231.

1321312230 is a `hidden beast` number, since 1 + 321 + 312 + 2 + 30 = 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 63 ways as a sum of consecutive naturals, for example, 305926 + ... + 310214.

It is an arithmetic number, because the mean of its divisors is an integer number (31660200).

Almost surely, 2^1321312230 is an apocalyptic number.

1321312230 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 1321312230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2026252800).

1321312230 is an abundant number, since it is smaller than the sum of its proper divisors (2731193370).

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

1321312230 is a wasteful number, since it uses less digits than its factorization.

1321312230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4475 (or 4469 counting only the distinct ones).

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

The square root of 1321312230 is about 36349.8587342509. The cubic root of 1321312230 is about 1097.3246914982.

Adding to 1321312230 its reverse (322131231), we get a palindrome (1643443461).

The spelling of 1321312230 in words is "one billion, three hundred twenty-one million, three hundred twelve thousand, two hundred thirty".