121000123 has 2 divisors, whose sum is σ = 121000124. Its totient is φ = 121000122.

The previous prime is 121000049. The next prime is 121000127. The reversal of 121000123 is 321000121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121000123 is a prime.

It is not a weakly prime, because it can be changed into another prime (121000127) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500061 + 60500062.

It is an arithmetic number, because the mean of its divisors is an integer number (60500062).

Almost surely, 2^121000123 is an apocalyptic number.

121000123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000123 is an equidigital number, since it uses as much as digits as its factorization.

121000123 is an odious number, because the sum of its binary digits is odd.

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

The square root of 121000123 is about 11000.0055909077. The cubic root of 121000123 is about 494.6089119195.

Adding to 121000123 its reverse (321000121), we get a palindrome (442000244).

The spelling of 121000123 in words is "one hundred twenty-one million, one hundred twenty-three", and thus it is an aban number.