121220123 has 8 divisors (see below), whose sum is σ = 122260992. Its totient is φ = 120183336.

The previous prime is 121220117. The next prime is 121220147. The reversal of 121220123 is 321022121.

It is a happy number.

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 121220123 - 2⁴ = 121220107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121220098 and 121220107.

It is not an unprimeable number, because it can be changed into a prime (121220153) 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, 90686 + ... + 92012.

It is an arithmetic number, because the mean of its divisors is an integer number (15282624).

Almost surely, 2^121220123 is an apocalyptic number.

121220123 is a deficient number, since it is larger than the sum of its proper divisors (1040869).

121220123 is a wasteful number, since it uses less digits than its factorization.

121220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121220123 is about 11010.0010445049. The cubic root of 121220123 is about 494.9084931008.

Adding to 121220123 its reverse (321022121), we get a palindrome (442242244).

The spelling of 121220123 in words is "one hundred twenty-one million, two hundred twenty thousand, one hundred twenty-three".