13020123034321 has 4 divisors (see below), whose sum is σ = 14021670960052. Its totient is φ = 12018575108592.

The previous prime is 13020123034249. The next prime is 13020123034339. The reversal of 13020123034321 is 12343032102031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1307054860225 + 11713068174096 = 1143265^2 + 3422436^2 .

It is not a de Polignac number, because 13020123034321 - 2¹⁵ = 13020123001553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13020123034421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500773962846 + ... + 500773962871.

It is an arithmetic number, because the mean of its divisors is an integer number (3505417740013).

Almost surely, 2^{13020123034321} is an apocalyptic number.

It is an amenable number.

13020123034321 is a deficient number, since it is larger than the sum of its proper divisors (1001547925731).

13020123034321 is a wasteful number, since it uses less digits than its factorization.

13020123034321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001547925730.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 13020123034321 its reverse (12343032102031), we get a palindrome (25363155136352).

The spelling of 13020123034321 in words is "thirteen trillion, twenty billion, one hundred twenty-three million, thirty-four thousand, three hundred twenty-one".