43011020200123 has 2 divisors, whose sum is σ = 43011020200124. Its totient is φ = 43011020200122.

The previous prime is 43011020200103. The next prime is 43011020200157. The reversal of 43011020200123 is 32100202011034.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43011020200123 - 2⁹ = 43011020199611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43011020200123.

It is not a weakly prime, because it can be changed into another prime (43011020200103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21505510100061 + 21505510100062.

It is an arithmetic number, because the mean of its divisors is an integer number (21505510100062).

Almost surely, 2^{43011020200123} is an apocalyptic number.

43011020200123 is a deficient number, since it is larger than the sum of its proper divisors (1).

43011020200123 is an equidigital number, since it uses as much as digits as its factorization.

43011020200123 is an evil number, because the sum of its binary digits is even.

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

Adding to 43011020200123 its reverse (32100202011034), we get a palindrome (75111222211157).

The spelling of 43011020200123 in words is "forty-three trillion, eleven billion, twenty million, two hundred thousand, one hundred twenty-three".