123004400122 has 4 divisors (see below), whose sum is σ = 184506600186. Its totient is φ = 61502200060.

The previous prime is 123004400111. The next prime is 123004400173. The reversal of 123004400122 is 221004400321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221004400321 = 131 ⋅1687056491.

It can be written as a sum of positive squares in only one way, i.e., 72662054481 + 50342345641 = 269559^2 + 224371^2 .

It is a super-2 number, since 2×123004400122² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123004400122.

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 as a sum of consecutive naturals, namely, 30751100029 + ... + 30751100032.

Almost surely, 2^123004400122 is an apocalyptic number.

123004400122 is a deficient number, since it is larger than the sum of its proper divisors (61502200064).

123004400122 is an equidigital number, since it uses as much as digits as its factorization.

123004400122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61502200063.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 123004400122 its reverse (221004400321), we get a palindrome (344008800443).

The spelling of 123004400122 in words is "one hundred twenty-three billion, four million, four hundred thousand, one hundred twenty-two".