1311230001 has 4 divisors (see below), whose sum is σ = 1748306672. Its totient is φ = 874153332.

The previous prime is 1311229981. The next prime is 1311230021. The reversal of 1311230001 is 1000321131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1000321131 = 3 ⋅333440377.

It is an interprime number because it is at equal distance from previous prime (1311229981) and next prime (1311230021).

It is not a de Polignac number, because 1311230001 - 2⁶ = 1311229937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311230021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218538331 + ... + 218538336.

It is an arithmetic number, because the mean of its divisors is an integer number (437076668).

Almost surely, 2^1311230001 is an apocalyptic number.

It is an amenable number.

1311230001 is a deficient number, since it is larger than the sum of its proper divisors (437076671).

1311230001 is an equidigital number, since it uses as much as digits as its factorization.

1311230001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437076670.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1311230001 is about 36210.9099719960. The cubic root of 1311230001 is about 1094.5265291083.

Adding to 1311230001 its reverse (1000321131), we get a palindrome (2311551132).

The spelling of 1311230001 in words is "one billion, three hundred eleven million, two hundred thirty thousand, one".