123242550013573 has 2 divisors, whose sum is σ = 123242550013574. Its totient is φ = 123242550013572.

The previous prime is 123242550013423. The next prime is 123242550013579. The reversal of 123242550013573 is 375310055242321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118766033468289 + 4476516545284 = 10897983^2 + 2115778^2 .

It is an emirp because it is prime and its reverse (375310055242321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123242550013573 - 2³³ = 123233960078981 is a prime.

It is a super-2 number, since 2×123242550013573² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123242550013579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621275006786 + 61621275006787.

It is an arithmetic number, because the mean of its divisors is an integer number (61621275006787).

Almost surely, 2^{123242550013573} is an apocalyptic number.

It is an amenable number.

123242550013573 is a deficient number, since it is larger than the sum of its proper divisors (1).

123242550013573 is an equidigital number, since it uses as much as digits as its factorization.

123242550013573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 43.

The spelling of 123242550013573 in words is "one hundred twenty-three trillion, two hundred forty-two billion, five hundred fifty million, thirteen thousand, five hundred seventy-three".