421211213 has 4 divisors (see below), whose sum is σ = 439524768. Its totient is φ = 402897660.

The previous prime is 421211177. The next prime is 421211237. The reversal of 421211213 is 312112124.

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 421211213 - 2¹⁰ = 421210189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421211191 and 421211200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421210213) 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, 9156743 + ... + 9156788.

It is an arithmetic number, because the mean of its divisors is an integer number (109881192).

Almost surely, 2^421211213 is an apocalyptic number.

It is an amenable number.

421211213 is a deficient number, since it is larger than the sum of its proper divisors (18313555).

421211213 is a wasteful number, since it uses less digits than its factorization.

421211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18313554.

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

The square root of 421211213 is about 20523.4308291767. The cubic root of 421211213 is about 749.6064382557.

Adding to 421211213 its reverse (312112124), we get a palindrome (733323337).

It can be divided in two parts, 42121 and 1213, that added together give a palindrome (43334).

The spelling of 421211213 in words is "four hundred twenty-one million, two hundred eleven thousand, two hundred thirteen".