121231011323 has 4 divisors (see below), whose sum is σ = 121416664368. Its totient is φ = 121045358280.

The previous prime is 121231011313. The next prime is 121231011383. The reversal of 121231011323 is 323110132121.

It is a happy number.

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 121231011323 - 2¹⁸ = 121230749179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121231011295 and 121231011304.

It is not an unprimeable number, because it can be changed into a prime (121231011313) 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, 92825543 + ... + 92826848.

It is an arithmetic number, because the mean of its divisors is an integer number (30354166092).

Almost surely, 2^121231011323 is an apocalyptic number.

121231011323 is a deficient number, since it is larger than the sum of its proper divisors (185653045).

121231011323 is an equidigital number, since it uses as much as digits as its factorization.

121231011323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185653044.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121231011323 its reverse (323110132121), we get a palindrome (444341143444).

The spelling of 121231011323 in words is "one hundred twenty-one billion, two hundred thirty-one million, eleven thousand, three hundred twenty-three".