421123211 has 4 divisors (see below), whose sum is σ = 424338024. Its totient is φ = 417908400.

The previous prime is 421123193. The next prime is 421123249. The reversal of 421123211 is 112321124.

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 421123211 - 2⁶ = 421123147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421123211.

It is not an unprimeable number, because it can be changed into a prime (421123271) 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, 1607210 + ... + 1607471.

It is an arithmetic number, because the mean of its divisors is an integer number (106084506).

Almost surely, 2^421123211 is an apocalyptic number.

421123211 is a deficient number, since it is larger than the sum of its proper divisors (3214813).

421123211 is a wasteful number, since it uses less digits than its factorization.

421123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3214812.

The product of its digits is 96, while the sum is 17.

The square root of 421123211 is about 20521.2867773929. The cubic root of 421123211 is about 749.5542305127.

Adding to 421123211 its reverse (112321124), we get a palindrome (533444335).

The spelling of 421123211 in words is "four hundred twenty-one million, one hundred twenty-three thousand, two hundred eleven".