121204431323 has 4 divisors (see below), whose sum is σ = 121291069200. Its totient is φ = 121117793448.

The previous prime is 121204431311. The next prime is 121204431329. The reversal of 121204431323 is 323134402121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121204431323 - 2⁴ = 121204431307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121204431292 and 121204431301.

It is not an unprimeable number, because it can be changed into a prime (121204431329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43316840 + ... + 43319637.

It is an arithmetic number, because the mean of its divisors is an integer number (30322767300).

Almost surely, 2^121204431323 is an apocalyptic number.

121204431323 is a deficient number, since it is larger than the sum of its proper divisors (86637877).

121204431323 is an equidigital number, since it uses as much as digits as its factorization.

121204431323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86637876.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 121204431323 its reverse (323134402121), we get a palindrome (444338833444).

The spelling of 121204431323 in words is "one hundred twenty-one billion, two hundred four million, four hundred thirty-one thousand, three hundred twenty-three".