123020123123 has 4 divisors (see below), whose sum is σ = 123905160120. Its totient is φ = 122135086128.

The previous prime is 123020123101. The next prime is 123020123143. The reversal of 123020123123 is 321321020321.

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

It is a cyclic number.

It is not a de Polignac number, because 123020123123 - 2¹⁸ = 123019860979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123020123095 and 123020123104.

It is not an unprimeable number, because it can be changed into a prime (123020123143) 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 3 ways as a sum of consecutive naturals, for example, 442518290 + ... + 442518567.

It is an arithmetic number, because the mean of its divisors is an integer number (30976290030).

Almost surely, 2^123020123123 is an apocalyptic number.

123020123123 is a deficient number, since it is larger than the sum of its proper divisors (885036997).

123020123123 is an equidigital number, since it uses as much as digits as its factorization.

123020123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885036996.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123020123123 its reverse (321321020321), we get a palindrome (444341143444).

The spelling of 123020123123 in words is "one hundred twenty-three billion, twenty million, one hundred twenty-three thousand, one hundred twenty-three".