123217358042 has 16 divisors (see below), whose sum is σ = 191700766152. Its totient is φ = 59350075200.

The previous prime is 123217358027. The next prime is 123217358081. The reversal of 123217358042 is 240853712321.

It can be written as a sum of positive squares in 4 ways, for example, as 96249478081 + 26967879961 = 310241^2 + 164219^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123217357987 and 123217358005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8235593 + ... + 8250540.

Almost surely, 2^123217358042 is an apocalyptic number.

123217358042 is a deficient number, since it is larger than the sum of its proper divisors (68483408110).

123217358042 is a wasteful number, since it uses less digits than its factorization.

123217358042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16486273.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 123217358042 in words is "one hundred twenty-three billion, two hundred seventeen million, three hundred fifty-eight thousand, forty-two".