421055360203421 has 4 divisors (see below), whose sum is σ = 443216168635200. Its totient is φ = 398894551771644.

The previous prime is 421055360203411. The next prime is 421055360203433. The reversal of 421055360203421 is 124302063550124.

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 a de Polignac number, because none of the positive numbers 2^k-421055360203421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421055360203411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11080404215861 + ... + 11080404215898.

It is an arithmetic number, because the mean of its divisors is an integer number (110804042158800).

Almost surely, 2^{421055360203421} is an apocalyptic number.

It is an amenable number.

421055360203421 is a deficient number, since it is larger than the sum of its proper divisors (22160808431779).

421055360203421 is a wasteful number, since it uses less digits than its factorization.

421055360203421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22160808431778.

The product of its (nonzero) digits is 172800, while the sum is 38.

The spelling of 421055360203421 in words is "four hundred twenty-one trillion, fifty-five billion, three hundred sixty million, two hundred three thousand, four hundred twenty-one".