123243500412442 has 4 divisors (see below), whose sum is σ = 184865250618666. Its totient is φ = 61621750206220.

The previous prime is 123243500412437. The next prime is 123243500412449. The reversal of 123243500412442 is 244214005342321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 66491972456121 + 56751527956321 = 8154261^2 + 7533361^2 .

It is not an unprimeable number, because it can be changed into a prime (123243500412449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30810875103109 + ... + 30810875103112.

Almost surely, 2^{123243500412442} is an apocalyptic number.

123243500412442 is a deficient number, since it is larger than the sum of its proper divisors (61621750206224).

123243500412442 is an equidigital number, since it uses as much as digits as its factorization.

123243500412442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61621750206223.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 123243500412442 its reverse (244214005342321), we get a palindrome (367457505754763).

The spelling of 123243500412442 in words is "one hundred twenty-three trillion, two hundred forty-three billion, five hundred million, four hundred twelve thousand, four hundred forty-two".