421055013325551 has 32 divisors (see below), whose sum is σ = 649753733529600. Its totient is φ = 239850499200480.

The previous prime is 421055013325549. The next prime is 421055013325577. The reversal of 421055013325551 is 155523310550124.

It is not a de Polignac number, because 421055013325551 - 2¹ = 421055013325549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421055013325351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2643775081 + ... + 2643934338.

It is an arithmetic number, because the mean of its divisors is an integer number (20304804172800).

Almost surely, 2^{421055013325551} is an apocalyptic number.

421055013325551 is a deficient number, since it is larger than the sum of its proper divisors (228698720204049).

421055013325551 is a wasteful number, since it uses less digits than its factorization.

421055013325551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5287709579.

The product of its (nonzero) digits is 450000, while the sum is 42.

Adding to 421055013325551 its reverse (155523310550124), we get a palindrome (576578323875675).

The spelling of 421055013325551 in words is "four hundred twenty-one trillion, fifty-five billion, thirteen million, three hundred twenty-five thousand, five hundred fifty-one".