123020121123 has 12 divisors (see below), whose sum is σ = 187048137640. Its totient is φ = 77696918496.

The previous prime is 123020121079. The next prime is 123020121127. The reversal of 123020121123 is 321121020321.

123020121123 is a `hidden beast` number, since 1 + 230 + 201 + 211 + 23 = 666.

It is not a de Polignac number, because 123020121123 - 2¹⁰ = 123020120099 is a prime.

It is a super-2 number, since 2×123020121123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123020121096 and 123020121105.

It is not an unprimeable number, because it can be changed into a prime (123020121127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359707786 + ... + 359708127.

Almost surely, 2^123020121123 is an apocalyptic number.

123020121123 is a deficient number, since it is larger than the sum of its proper divisors (64028016517).

123020121123 is a wasteful number, since it uses less digits than its factorization.

123020121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719415938 (or 719415935 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 123020121123 its reverse (321121020321), we get a palindrome (444141141444).

The spelling of 123020121123 in words is "one hundred twenty-three billion, twenty million, one hundred twenty-one thousand, one hundred twenty-three".