521055645412421 has 8 divisors (see below), whose sum is σ = 601273643528064. Its totient is φ = 442283016632400.

The previous prime is 521055645412373. The next prime is 521055645412429. The reversal of 521055645412421 is 124214546550125.

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 521055645412421 - 2¹⁰ = 521055645411397 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 (521055645412429) 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, 361342333130 + ... + 361342334571.

It is an arithmetic number, because the mean of its divisors is an integer number (75159205441008).

Almost surely, 2^{521055645412421} is an apocalyptic number.

It is an amenable number.

521055645412421 is a deficient number, since it is larger than the sum of its proper divisors (80217998115643).

521055645412421 is a wasteful number, since it uses less digits than its factorization.

521055645412421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722684667811.

The product of its (nonzero) digits is 1920000, while the sum is 47.

The spelling of 521055645412421 in words is "five hundred twenty-one trillion, fifty-five billion, six hundred forty-five million, four hundred twelve thousand, four hundred twenty-one".