123251205342511 has 2 divisors, whose sum is σ = 123251205342512. Its totient is φ = 123251205342510.

The previous prime is 123251205342407. The next prime is 123251205342539. The reversal of 123251205342511 is 115243502152321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123251205342511 - 2¹³ = 123251205334319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123251205372511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61625602671255 + 61625602671256.

It is an arithmetic number, because the mean of its divisors is an integer number (61625602671256).

Almost surely, 2^{123251205342511} is an apocalyptic number.

123251205342511 is a deficient number, since it is larger than the sum of its proper divisors (1).

123251205342511 is an equidigital number, since it uses as much as digits as its factorization.

123251205342511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 123251205342511 its reverse (115243502152321), we get a palindrome (238494707494832).

The spelling of 123251205342511 in words is "one hundred twenty-three trillion, two hundred fifty-one billion, two hundred five million, three hundred forty-two thousand, five hundred eleven".