12311221220003 has 4 divisors (see below), whose sum is σ = 12311265994368. Its totient is φ = 12311176445640.

The previous prime is 12311221219991. The next prime is 12311221220057. The reversal of 12311221220003 is 30002212211321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12311221220003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12311221270003) 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, 21972176 + ... + 22525517.

It is an arithmetic number, because the mean of its divisors is an integer number (3077816498592).

Almost surely, 2^{12311221220003} is an apocalyptic number.

12311221220003 is a deficient number, since it is larger than the sum of its proper divisors (44774365).

12311221220003 is an equidigital number, since it uses as much as digits as its factorization.

12311221220003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44774364.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12311221220003 its reverse (30002212211321), we get a palindrome (42313433431324).

The spelling of 12311221220003 in words is "twelve trillion, three hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, three".