123120120043 has 2 divisors, whose sum is σ = 123120120044. Its totient is φ = 123120120042.

The previous prime is 123120119957. The next prime is 123120120089. The reversal of 123120120043 is 340021021321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123120120043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123120120043.

It is not a weakly prime, because it can be changed into another prime (123120120743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61560060021 + 61560060022.

It is an arithmetic number, because the mean of its divisors is an integer number (61560060022).

Almost surely, 2^123120120043 is an apocalyptic number.

123120120043 is a deficient number, since it is larger than the sum of its proper divisors (1).

123120120043 is an equidigital number, since it uses as much as digits as its factorization.

123120120043 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 123120120043 its reverse (340021021321), we get a palindrome (463141141364).

The spelling of 123120120043 in words is "one hundred twenty-three billion, one hundred twenty million, one hundred twenty thousand, forty-three".