121431323 has 16 divisors (see below), whose sum is σ = 143246880. Its totient is φ = 101853696.

The previous prime is 121431313. The next prime is 121431361. The reversal of 121431323 is 323134121.

It is a cyclic number.

It is not a de Polignac number, because 121431323 - 2⁸ = 121431067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121431295 and 121431304.

It is not an unprimeable number, because it can be changed into a prime (121431313) 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, 3065 + ... + 15882.

It is an arithmetic number, because the mean of its divisors is an integer number (8952930).

Almost surely, 2^121431323 is an apocalyptic number.

121431323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121431323 is a deficient number, since it is larger than the sum of its proper divisors (21815557).

121431323 is a wasteful number, since it uses less digits than its factorization.

121431323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19006.

The product of its digits is 432, while the sum is 20.

The square root of 121431323 is about 11019.5881501987. The cubic root of 121431323 is about 495.1957502160.

Adding to 121431323 its reverse (323134121), we get a palindrome (444565444).

The spelling of 121431323 in words is "one hundred twenty-one million, four hundred thirty-one thousand, three hundred twenty-three".