13220251343501 has 8 divisors (see below), whose sum is σ = 13226950255608. Its totient is φ = 13213552768000.

The previous prime is 13220251343441. The next prime is 13220251343531. The reversal of 13220251343501 is 10534315202231.

It can be written as a sum of positive squares in 4 ways, for example, as 7859197337476 + 5361054006025 = 2803426^2 + 2315395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13220251343501 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 (13220251343531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123893111 + ... + 123999771.

It is an arithmetic number, because the mean of its divisors is an integer number (1653368781951).

Almost surely, 2^{13220251343501} is an apocalyptic number.

It is an amenable number.

13220251343501 is a deficient number, since it is larger than the sum of its proper divisors (6698912107).

13220251343501 is a wasteful number, since it uses less digits than its factorization.

13220251343501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168303.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 13220251343501 its reverse (10534315202231), we get a palindrome (23754566545732).

The spelling of 13220251343501 in words is "thirteen trillion, two hundred twenty billion, two hundred fifty-one million, three hundred forty-three thousand, five hundred one".