13123412152321 has 4 divisors (see below), whose sum is σ = 13130441298352. Its totient is φ = 13116383006292.

The previous prime is 13123412152289. The next prime is 13123412152369. The reversal of 13123412152321 is 12325121432131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13123412152321 - 2⁵ = 13123412152289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13123412152381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3514570215 + ... + 3514573948.

It is an arithmetic number, because the mean of its divisors is an integer number (3282610324588).

Almost surely, 2^{13123412152321} is an apocalyptic number.

It is an amenable number.

13123412152321 is a deficient number, since it is larger than the sum of its proper divisors (7029146031).

13123412152321 is an equidigital number, since it uses as much as digits as its factorization.

13123412152321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7029146030.

The product of its digits is 8640, while the sum is 31.

Adding to 13123412152321 its reverse (12325121432131), we get a palindrome (25448533584452).

The spelling of 13123412152321 in words is "thirteen trillion, one hundred twenty-three billion, four hundred twelve million, one hundred fifty-two thousand, three hundred twenty-one".