20312220111103 has 2 divisors, whose sum is σ = 20312220111104. Its totient is φ = 20312220111102.

The previous prime is 20312220111019. The next prime is 20312220111119. The reversal of 20312220111103 is 30111102221302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312220111103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312220111173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156110055551 + 10156110055552.

It is an arithmetic number, because the mean of its divisors is an integer number (10156110055552).

Almost surely, 2^{20312220111103} is an apocalyptic number.

20312220111103 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312220111103 is an equidigital number, since it uses as much as digits as its factorization.

20312220111103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20312220111103 its reverse (30111102221302), we get a palindrome (50423322332405).

The spelling of 20312220111103 in words is "twenty trillion, three hundred twelve billion, two hundred twenty million, one hundred eleven thousand, one hundred three".