123012143 has 2 divisors, whose sum is σ = 123012144. Its totient is φ = 123012142.

The previous prime is 123012107. The next prime is 123012157. The reversal of 123012143 is 341210321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123012143 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123012103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506071 + 61506072.

It is an arithmetic number, because the mean of its divisors is an integer number (61506072).

Almost surely, 2^123012143 is an apocalyptic number.

123012143 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012143 is an equidigital number, since it uses as much as digits as its factorization.

123012143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 123012143 is about 11091.0839416172. The cubic root of 123012143 is about 497.3353484913.

Adding to 123012143 its reverse (341210321), we get a palindrome (464222464).

The spelling of 123012143 in words is "one hundred twenty-three million, twelve thousand, one hundred forty-three".