13401220421 has 16 divisors (see below), whose sum is σ = 14053253760. Its totient is φ = 12762361920.

The previous prime is 13401220333. The next prime is 13401220433. The reversal of 13401220421 is 12402210431.

13401220421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13401220421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13401220393 and 13401220402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13401220321) 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 15 ways as a sum of consecutive naturals, for example, 1586816 + ... + 1595238.

It is an arithmetic number, because the mean of its divisors is an integer number (878328360).

Almost surely, 2^13401220421 is an apocalyptic number.

It is an amenable number.

13401220421 is a deficient number, since it is larger than the sum of its proper divisors (652033339).

13401220421 is an equidigital number, since it uses as much as digits as its factorization.

13401220421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9196.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 13401220421 its reverse (12402210431), we get a palindrome (25803430852).

The spelling of 13401220421 in words is "thirteen billion, four hundred one million, two hundred twenty thousand, four hundred twenty-one".