121405323 has 16 divisors (see below), whose sum is σ = 175212800. Its totient is φ = 74330784.

The previous prime is 121405321. The next prime is 121405327. The reversal of 121405323 is 323504121.

It is not a de Polignac number, because 121405323 - 2¹ = 121405321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121405323.

It is not an unprimeable number, because it can be changed into a prime (121405321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61 + ... + 15582.

It is an arithmetic number, because the mean of its divisors is an integer number (10950800).

Almost surely, 2^121405323 is an apocalyptic number.

121405323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121405323 is a deficient number, since it is larger than the sum of its proper divisors (53807477).

121405323 is a wasteful number, since it uses less digits than its factorization.

121405323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15858.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 121405323 is about 11018.4083696331. The cubic root of 121405323 is about 495.1604051112.

Adding to 121405323 its reverse (323504121), we get a palindrome (444909444).

The spelling of 121405323 in words is "one hundred twenty-one million, four hundred five thousand, three hundred twenty-three".