421131211 has 4 divisors (see below), whose sum is σ = 423313432. Its totient is φ = 418948992.

The previous prime is 421131209. The next prime is 421131253. The reversal of 421131211 is 112131124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421131211 - 2¹ = 421131209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421131811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090821 + ... + 1091206.

It is an arithmetic number, because the mean of its divisors is an integer number (105828358).

Almost surely, 2^421131211 is an apocalyptic number.

421131211 is a deficient number, since it is larger than the sum of its proper divisors (2182221).

421131211 is a wasteful number, since it uses less digits than its factorization.

421131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182220.

The product of its digits is 48, while the sum is 16.

The square root of 421131211 is about 20521.4816960180. The cubic root of 421131211 is about 749.5589768638.

Adding to 421131211 its reverse (112131124), we get a palindrome (533262335).

The spelling of 421131211 in words is "four hundred twenty-one million, one hundred thirty-one thousand, two hundred eleven".