120123203121 has 16 divisors (see below), whose sum is σ = 178602768000. Its totient is φ = 79793025264.

The previous prime is 120123203117. The next prime is 120123203191. The reversal of 120123203121 is 121302321021.

120123203121 is a `hidden beast` number, since 1 + 20 + 12 + 320 + 312 + 1 = 666.

It is not a de Polignac number, because 120123203121 - 2² = 120123203117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120123203094 and 120123203103.

It is not an unprimeable number, because it can be changed into a prime (120123203191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8023221 + ... + 8038178.

It is an arithmetic number, because the mean of its divisors is an integer number (11162673000).

Almost surely, 2^120123203121 is an apocalyptic number.

It is an amenable number.

120123203121 is a deficient number, since it is larger than the sum of its proper divisors (58479564879).

120123203121 is a wasteful number, since it uses less digits than its factorization.

120123203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16061685 (or 16061679 counting only the distinct ones).

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

Adding to 120123203121 its reverse (121302321021), we get a palindrome (241425524142).

The spelling of 120123203121 in words is "one hundred twenty billion, one hundred twenty-three million, two hundred three thousand, one hundred twenty-one".