123000121 has 8 divisors (see below), whose sum is σ = 125733384. Its totient is φ = 120282240.

The previous prime is 123000037. The next prime is 123000133. The reversal of 123000121 is 121000321.

It can be written as a sum of positive squares in 4 ways, for example, as 2768896 + 120231225 = 1664^2 + 10965^2 .

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 123000121 - 2¹⁵ = 122967353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123000098 and 123000107.

It is not an unprimeable number, because it can be changed into a prime (123000421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13141 + ... + 20461.

It is an arithmetic number, because the mean of its divisors is an integer number (15716673).

Almost surely, 2^123000121 is an apocalyptic number.

It is an amenable number.

123000121 is a deficient number, since it is larger than the sum of its proper divisors (2733263).

123000121 is an equidigital number, since it uses as much as digits as its factorization.

123000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7691.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 123000121 is about 11090.5419615094. The cubic root of 123000121 is about 497.3191464043.

Adding to 123000121 its reverse (121000321), we get a palindrome (244000442).

The spelling of 123000121 in words is "one hundred twenty-three million, one hundred twenty-one", and thus it is an aban number.