421305532221 has 16 divisors (see below), whose sum is σ = 647879196800. Its totient is φ = 238537338048.

The previous prime is 421305532187. The next prime is 421305532229. The reversal of 421305532221 is 122235503124.

It is not a de Polignac number, because 421305532221 - 2⁷ = 421305532093 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 (421305532229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92026006 + ... + 92030583.

It is an arithmetic number, because the mean of its divisors is an integer number (40492449800).

Almost surely, 2^421305532221 is an apocalyptic number.

It is an amenable number.

421305532221 is a deficient number, since it is larger than the sum of its proper divisors (226573664579).

421305532221 is a wasteful number, since it uses less digits than its factorization.

421305532221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184056708.

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 421305532221 in words is "four hundred twenty-one billion, three hundred five million, five hundred thirty-two thousand, two hundred twenty-one".