121210123 has 8 divisors (see below), whose sum is σ = 122332448. Its totient is φ = 120092544.

The previous prime is 121210081. The next prime is 121210157. The reversal of 121210123 is 321012121.

121210123 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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 121210123 - 2⁹ = 121209611 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121210183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67090 + ... + 68872.

It is an arithmetic number, because the mean of its divisors is an integer number (15291556).

Almost surely, 2^121210123 is an apocalyptic number.

121210123 is a deficient number, since it is larger than the sum of its proper divisors (1122325).

121210123 is a wasteful number, since it uses less digits than its factorization.

121210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121210123 is about 11009.5469025751. The cubic root of 121210123 is about 494.8948836414.

Adding to 121210123 its reverse (321012121), we get a palindrome (442222244).

The spelling of 121210123 in words is "one hundred twenty-one million, two hundred ten thousand, one hundred twenty-three".