13531201421 has 8 divisors (see below), whose sum is σ = 13579325760. Its totient is φ = 13483124928.

The previous prime is 13531201417. The next prime is 13531201549. The reversal of 13531201421 is 12410213531.

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 13531201421 - 2² = 13531201417 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 (13531261421) 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 7 ways as a sum of consecutive naturals, for example, 611570 + ... + 633308.

It is an arithmetic number, because the mean of its divisors is an integer number (1697415720).

Almost surely, 2^13531201421 is an apocalyptic number.

It is an amenable number.

13531201421 is a deficient number, since it is larger than the sum of its proper divisors (48124339).

13531201421 is a wasteful number, since it uses less digits than its factorization.

13531201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23923.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 13531201421 its reverse (12410213531), we get a palindrome (25941414952).

The spelling of 13531201421 in words is "thirteen billion, five hundred thirty-one million, two hundred one thousand, four hundred twenty-one".