12312111003 has 4 divisors (see below), whose sum is σ = 16416148008. Its totient is φ = 8208074000.

The previous prime is 12312110981. The next prime is 12312111013. The reversal of 12312111003 is 30011121321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30011121321 = 3 ⋅10003707107.

It is a cyclic number.

It is not a de Polignac number, because 12312111003 - 2¹² = 12312106907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12312111013) 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, 2052018498 + ... + 2052018503.

It is an arithmetic number, because the mean of its divisors is an integer number (4104037002).

Almost surely, 2^12312111003 is an apocalyptic number.

12312111003 is a deficient number, since it is larger than the sum of its proper divisors (4104037005).

12312111003 is an equidigital number, since it uses as much as digits as its factorization.

12312111003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104037004.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 12312111003 its reverse (30011121321), we get a palindrome (42323232324).

The spelling of 12312111003 in words is "twelve billion, three hundred twelve million, one hundred eleven thousand, three".