13321240431421 has 8 divisors (see below), whose sum is σ = 14428875809880. Its totient is φ = 12225451420992.

The previous prime is 13321240431413. The next prime is 13321240431431. The reversal of 13321240431421 is 12413404212331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5854410928921 + 7466829502500 = 2419589^2 + 2732550^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13321240431421 - 2³ = 13321240431413 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 (13321240431431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2961589666 + ... + 2961594163.

It is an arithmetic number, because the mean of its divisors is an integer number (1803609476235).

Almost surely, 2^{13321240431421} is an apocalyptic number.

It is an amenable number.

13321240431421 is a deficient number, since it is larger than the sum of its proper divisors (1107635378459).

13321240431421 is a wasteful number, since it uses less digits than its factorization.

13321240431421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5923184015.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 13321240431421 its reverse (12413404212331), we get a palindrome (25734644643752).

The spelling of 13321240431421 in words is "thirteen trillion, three hundred twenty-one billion, two hundred forty million, four hundred thirty-one thousand, four hundred twenty-one".