13355553421 has 4 divisors (see below), whose sum is σ = 15263489632. Its totient is φ = 11447617212.

The previous prime is 13355553403. The next prime is 13355553427. The reversal of 13355553421 is 12435555331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13355553421 - 2²¹ = 13353456269 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 (13355553427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 953968095 + ... + 953968108.

It is an arithmetic number, because the mean of its divisors is an integer number (3815872408).

Almost surely, 2^13355553421 is an apocalyptic number.

It is an amenable number.

13355553421 is a deficient number, since it is larger than the sum of its proper divisors (1907936211).

13355553421 is an equidigital number, since it uses as much as digits as its factorization.

13355553421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907936210.

The product of its digits is 135000, while the sum is 37.

The spelling of 13355553421 in words is "thirteen billion, three hundred fifty-five million, five hundred fifty-three thousand, four hundred twenty-one".