1312323011 has 4 divisors (see below), whose sum is σ = 1313280192. Its totient is φ = 1311365832.

The previous prime is 1312322987. The next prime is 1312323059. The reversal of 1312323011 is 1103232131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1103232131 = 19 ⋅58064849.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312323011 is a prime.

It is a super-3 number, since 3×1312323011³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312326011) 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, 476531 + ... + 479276.

It is an arithmetic number, because the mean of its divisors is an integer number (328320048).

Almost surely, 2^1312323011 is an apocalyptic number.

1312323011 is a deficient number, since it is larger than the sum of its proper divisors (957181).

1312323011 is an equidigital number, since it uses as much as digits as its factorization.

1312323011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957180.

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

The square root of 1312323011 is about 36225.9991028543. Note that the first 3 decimals coincide. The cubic root of 1312323011 is about 1094.8305683652.

Adding to 1312323011 its reverse (1103232131), we get a palindrome (2415555142).

The spelling of 1312323011 in words is "one billion, three hundred twelve million, three hundred twenty-three thousand, eleven".