421032221210421 has 12 divisors (see below), whose sum is σ = 608157832688172. Its totient is φ = 280688064475776.

The previous prime is 421032221210369. The next prime is 421032221210429. The reversal of 421032221210421 is 124012122230124.

421032221210421 is a `hidden beast` number, since 4 + 2 + 1 + 0 + 3 + 2 + 2 + 21 + 210 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 161292260607921 + 259739960602500 = 12700089^2 + 16116450^2 .

It is not a de Polignac number, because 421032221210421 - 2⁶ = 421032221210357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421032221210429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49025755 + ... + 56970071.

It is an arithmetic number, because the mean of its divisors is an integer number (50679819390681).

Almost surely, 2^{421032221210421} is an apocalyptic number.

It is an amenable number.

421032221210421 is a deficient number, since it is larger than the sum of its proper divisors (187125611477751).

421032221210421 is a wasteful number, since it uses less digits than its factorization.

421032221210421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13832980 (or 13832977 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 421032221210421 its reverse (124012122230124), we get a palindrome (545044343440545).

The spelling of 421032221210421 in words is "four hundred twenty-one trillion, thirty-two billion, two hundred twenty-one million, two hundred ten thousand, four hundred twenty-one".