1230313121 has 4 divisors (see below), whose sum is σ = 1231039812. Its totient is φ = 1229586432.

The previous prime is 1230313037. The next prime is 1230313129. The reversal of 1230313121 is 1213130321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1213130321 = 13 ⋅93317717.

It can be written as a sum of positive squares in 2 ways, for example, as 736362496 + 493950625 = 27136^2 + 22225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230313121 - 2²⁶ = 1163204257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1230313121.

It is not an unprimeable number, because it can be changed into a prime (1230313129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360800 + ... + 364193.

It is an arithmetic number, because the mean of its divisors is an integer number (307759953).

Almost surely, 2^1230313121 is an apocalyptic number.

It is an amenable number.

1230313121 is a deficient number, since it is larger than the sum of its proper divisors (726691).

1230313121 is an equidigital number, since it uses as much as digits as its factorization.

1230313121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726690.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1230313121 is about 35075.8196055345. The cubic root of 1230313121 is about 1071.5321808824.

Adding to 1230313121 its reverse (1213130321), we get a palindrome (2443443442).

The spelling of 1230313121 in words is "one billion, two hundred thirty million, three hundred thirteen thousand, one hundred twenty-one".