121043123 has 2 divisors, whose sum is σ = 121043124. Its totient is φ = 121043122.

The previous prime is 121043081. The next prime is 121043137. The reversal of 121043123 is 321340121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121043123 - 2²⁴ = 104265907 is a prime.

It is not a weakly prime, because it can be changed into another prime (121043423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60521561 + 60521562.

It is an arithmetic number, because the mean of its divisors is an integer number (60521562).

Almost surely, 2^121043123 is an apocalyptic number.

121043123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121043123 is an equidigital number, since it uses as much as digits as its factorization.

121043123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 121043123 is about 11001.9599617523. The cubic root of 121043123 is about 494.6674949573.

Adding to 121043123 its reverse (321340121), we get a palindrome (442383244).

The spelling of 121043123 in words is "one hundred twenty-one million, forty-three thousand, one hundred twenty-three".