20123131103203 has 2 divisors, whose sum is σ = 20123131103204. Its totient is φ = 20123131103202.

The previous prime is 20123131103197. The next prime is 20123131103227. The reversal of 20123131103203 is 30230113132102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20123131103203 - 2²⁹ = 20122594232291 is a prime.

It is not a weakly prime, because it can be changed into another prime (20123131103263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061565551601 + 10061565551602.

It is an arithmetic number, because the mean of its divisors is an integer number (10061565551602).

Almost surely, 2^{20123131103203} is an apocalyptic number.

20123131103203 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123131103203 is an equidigital number, since it uses as much as digits as its factorization.

20123131103203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20123131103203 its reverse (30230113132102), we get a palindrome (50353244235305).

The spelling of 20123131103203 in words is "twenty trillion, one hundred twenty-three billion, one hundred thirty-one million, one hundred three thousand, two hundred three".