20112103243 has 2 divisors, whose sum is σ = 20112103244. Its totient is φ = 20112103242.

The previous prime is 20112103217. The next prime is 20112103261. The reversal of 20112103243 is 34230121102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20112103243 - 2⁵ = 20112103211 is a prime.

It is a super-2 number, since 2×20112103243² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20112103243.

It is not a weakly prime, because it can be changed into another prime (20112103043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056051621 + 10056051622.

It is an arithmetic number, because the mean of its divisors is an integer number (10056051622).

Almost surely, 2^20112103243 is an apocalyptic number.

20112103243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112103243 is an equidigital number, since it uses as much as digits as its factorization.

20112103243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20112103243 its reverse (34230121102), we get a palindrome (54342224345).

The spelling of 20112103243 in words is "twenty billion, one hundred twelve million, one hundred three thousand, two hundred forty-three".