20312440121003 has 2 divisors, whose sum is σ = 20312440121004. Its totient is φ = 20312440121002.

The previous prime is 20312440120997. The next prime is 20312440121041. The reversal of 20312440121003 is 30012104421302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312440121003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20312440121003.

It is not a weakly prime, because it can be changed into another prime (20312440121203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156220060501 + 10156220060502.

It is an arithmetic number, because the mean of its divisors is an integer number (10156220060502).

Almost surely, 2^{20312440121003} is an apocalyptic number.

20312440121003 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312440121003 is an equidigital number, since it uses as much as digits as its factorization.

20312440121003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20312440121003 its reverse (30012104421302), we get a palindrome (50324544542305).

The spelling of 20312440121003 in words is "twenty trillion, three hundred twelve billion, four hundred forty million, one hundred twenty-one thousand, three".