121003123 has 2 divisors, whose sum is σ = 121003124. Its totient is φ = 121003122.

The previous prime is 121003111. The next prime is 121003231. The reversal of 121003123 is 321300121.

Together with next prime (121003231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (321300121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121003123 - 2¹⁷ = 120872051 is a prime.

It is not a weakly prime, because it can be changed into another prime (121000123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501561 + 60501562.

It is an arithmetic number, because the mean of its divisors is an integer number (60501562).

Almost surely, 2^121003123 is an apocalyptic number.

121003123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121003123 is an equidigital number, since it uses as much as digits as its factorization.

121003123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 121003123 is about 11000.1419536295. The cubic root of 121003123 is about 494.6129995585.

Adding to 121003123 its reverse (321300121), we get a palindrome (442303244).

The spelling of 121003123 in words is "one hundred twenty-one million, three thousand, one hundred twenty-three".