20313212123 has 2 divisors, whose sum is σ = 20313212124. Its totient is φ = 20313212122.

The previous prime is 20313212089. The next prime is 20313212137. The reversal of 20313212123 is 32121231302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20313212123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20313212095 and 20313212104.

It is not a weakly prime, because it can be changed into another prime (20313292123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156606061 + 10156606062.

It is an arithmetic number, because the mean of its divisors is an integer number (10156606062).

Almost surely, 2^20313212123 is an apocalyptic number.

20313212123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313212123 is an equidigital number, since it uses as much as digits as its factorization.

20313212123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20313212123 its reverse (32121231302), we get a palindrome (52434443425).

The spelling of 20313212123 in words is "twenty billion, three hundred thirteen million, two hundred twelve thousand, one hundred twenty-three".