12121313023 has 4 divisors (see below), whose sum is σ = 12122645328. Its totient is φ = 12119980720.

The previous prime is 12121313003. The next prime is 12121313027. The reversal of 12121313023 is 32031312121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32031312121 = 197 ⋅162595493.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121313023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121313027) 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, 652411 + ... + 670732.

It is an arithmetic number, because the mean of its divisors is an integer number (3030661332).

Almost surely, 2^12121313023 is an apocalyptic number.

12121313023 is a deficient number, since it is larger than the sum of its proper divisors (1332305).

12121313023 is an equidigital number, since it uses as much as digits as its factorization.

12121313023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332304.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12121313023 its reverse (32031312121), we get a palindrome (44152625144).

The spelling of 12121313023 in words is "twelve billion, one hundred twenty-one million, three hundred thirteen thousand, twenty-three".