421010213 has 4 divisors (see below), whose sum is σ = 453395628. Its totient is φ = 388624800.

The previous prime is 421010209. The next prime is 421010221. The reversal of 421010213 is 312010124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 261695329 + 159314884 = 16177^2 + 12622^2 .

It is a cyclic number.

It is not a de Polignac number, because 421010213 - 2² = 421010209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421010243) 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, 16192688 + ... + 16192713.

It is an arithmetic number, because the mean of its divisors is an integer number (113348907).

Almost surely, 2^421010213 is an apocalyptic number.

It is an amenable number.

421010213 is a deficient number, since it is larger than the sum of its proper divisors (32385415).

421010213 is a wasteful number, since it uses less digits than its factorization.

421010213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32385414.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 421010213 is about 20518.5334027557. The cubic root of 421010213 is about 749.4871830679.

Adding to 421010213 its reverse (312010124), we get a palindrome (733020337).

The spelling of 421010213 in words is "four hundred twenty-one million, ten thousand, two hundred thirteen".