121306823 has 8 divisors (see below), whose sum is σ = 135562896. Its totient is φ = 107588800.

The previous prime is 121306819. The next prime is 121306847. The reversal of 121306823 is 328603121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121306823 - 2² = 121306819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121306792 and 121306801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121302823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134036 + ... + 134937.

It is an arithmetic number, because the mean of its divisors is an integer number (16945362).

Almost surely, 2^121306823 is an apocalyptic number.

121306823 is a deficient number, since it is larger than the sum of its proper divisors (14256073).

121306823 is a wasteful number, since it uses less digits than its factorization.

121306823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269025.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 121306823 is about 11013.9376700615. The cubic root of 121306823 is about 495.0264557503.

Adding to 121306823 its reverse (328603121), we get a palindrome (449909944).

The spelling of 121306823 in words is "one hundred twenty-one million, three hundred six thousand, eight hundred twenty-three".