12311001 has 16 divisors (see below), whose sum is σ = 18292800. Its totient is φ = 8182944.

The previous prime is 12310997. The next prime is 12311017. The reversal of 12311001 is 10011321.

It is not a de Polignac number, because 12311001 - 2² = 12310997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (12311401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16290 + ... + 17028.

It is an arithmetic number, because the mean of its divisors is an integer number (1143300).

Almost surely, 2^12311001 is an apocalyptic number.

It is an amenable number.

12311001 is a deficient number, since it is larger than the sum of its proper divisors (5981799).

12311001 is an equidigital number, since it uses as much as digits as its factorization.

12311001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 12311001 is about 3508.7036067471. The cubic root of 12311001 is about 230.9038223330.

Adding to 12311001 its reverse (10011321), we get a palindrome (22322322).

The spelling of 12311001 in words is "twelve million, three hundred eleven thousand, one".