521421354114501 has 4 divisors (see below), whose sum is σ = 695228472152672. Its totient is φ = 347614236076332.

The previous prime is 521421354114457. The next prime is 521421354114569. The reversal of 521421354114501 is 105411453124125.

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 de Polignac number, because none of the positive numbers 2^k-521421354114501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521421354114501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521421354114581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86903559019081 + ... + 86903559019086.

It is an arithmetic number, because the mean of its divisors is an integer number (173807118038168).

Almost surely, 2^{521421354114501} is an apocalyptic number.

It is an amenable number.

521421354114501 is a deficient number, since it is larger than the sum of its proper divisors (173807118038171).

521421354114501 is a wasteful number, since it uses less digits than its factorization.

521421354114501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173807118038170.

The product of its (nonzero) digits is 96000, while the sum is 39.

The spelling of 521421354114501 in words is "five hundred twenty-one trillion, four hundred twenty-one billion, three hundred fifty-four million, one hundred fourteen thousand, five hundred one".