123005122 has 4 divisors (see below), whose sum is σ = 184507686. Its totient is φ = 61502560.

The previous prime is 123005093. The next prime is 123005123. The reversal of 123005122 is 221500321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221500321 = 7 ⋅31642903.

It can be written as a sum of positive squares in only one way, i.e., 120758121 + 2247001 = 10989^2 + 1499^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123005096 and 123005105.

It is not an unprimeable number, because it can be changed into a prime (123005123) 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, 30751279 + ... + 30751282.

Almost surely, 2^123005122 is an apocalyptic number.

123005122 is a deficient number, since it is larger than the sum of its proper divisors (61502564).

123005122 is an equidigital number, since it uses as much as digits as its factorization.

123005122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61502563.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 123005122 is about 11090.7674215989. The cubic root of 123005122 is about 497.3258863959.

Adding to 123005122 its reverse (221500321), we get a palindrome (344505443).

The spelling of 123005122 in words is "one hundred twenty-three million, five thousand, one hundred twenty-two".