123120100123 has 8 divisors (see below), whose sum is σ = 127095920640. Its totient is φ = 119144542440.

The previous prime is 123120100057. The next prime is 123120100157. The reversal of 123120100123 is 321001021321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123120100123 - 2¹³ = 123120091931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123120100097 and 123120100106.

It is not an unprimeable number, because it can be changed into a prime (123120140123) by changing a digit.

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, 1419438 + ... + 1503676.

It is an arithmetic number, because the mean of its divisors is an integer number (15886990080).

Almost surely, 2^123120100123 is an apocalyptic number.

123120100123 is a deficient number, since it is larger than the sum of its proper divisors (3975820517).

123120100123 is an equidigital number, since it uses as much as digits as its factorization.

123120100123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131417.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 123120100123 its reverse (321001021321), we get a palindrome (444121121444).

The spelling of 123120100123 in words is "one hundred twenty-three billion, one hundred twenty million, one hundred thousand, one hundred twenty-three".