20123212243 has 2 divisors, whose sum is σ = 20123212244. Its totient is φ = 20123212242.

The previous prime is 20123212183. The next prime is 20123212253. The reversal of 20123212243 is 34221232102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20123212243 - 2¹⁷ = 20123081171 is a prime.

It is not a weakly prime, because it can be changed into another prime (20123212253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061606121 + 10061606122.

It is an arithmetic number, because the mean of its divisors is an integer number (10061606122).

Almost surely, 2^20123212243 is an apocalyptic number.

20123212243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123212243 is an equidigital number, since it uses as much as digits as its factorization.

20123212243 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 22.

Adding to 20123212243 its reverse (34221232102), we get a palindrome (54344444345).

The spelling of 20123212243 in words is "twenty billion, one hundred twenty-three million, two hundred twelve thousand, two hundred forty-three".