421132040434221 has 4 divisors (see below), whose sum is σ = 561509387245632. Its totient is φ = 280754693622812.

The previous prime is 421132040434169. The next prime is 421132040434267. The reversal of 421132040434221 is 122434040231124.

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 not a de Polignac number, because 421132040434221 - 2³³ = 421123450499629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421132040434421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70188673405701 + ... + 70188673405706.

It is an arithmetic number, because the mean of its divisors is an integer number (140377346811408).

Almost surely, 2^{421132040434221} is an apocalyptic number.

It is an amenable number.

421132040434221 is a deficient number, since it is larger than the sum of its proper divisors (140377346811411).

421132040434221 is a wasteful number, since it uses less digits than its factorization.

421132040434221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140377346811410.

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 421132040434221 its reverse (122434040231124), we get a palindrome (543566080665345).

The spelling of 421132040434221 in words is "four hundred twenty-one trillion, one hundred thirty-two billion, forty million, four hundred thirty-four thousand, two hundred twenty-one".