213213004423109 has 4 divisors (see below), whose sum is σ = 218975518056204. Its totient is φ = 207450490790016.

The previous prime is 213213004423049. The next prime is 213213004423117. The reversal of 213213004423109 is 901324400312312.

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 123381998985025 + 89831005438084 = 11107745^2 + 9477922^2 .

It is a cyclic number.

It is not a de Polignac number, because 213213004423109 - 2¹² = 213213004419013 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 (213213004423189) 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, 2881256816492 + ... + 2881256816565.

It is an arithmetic number, because the mean of its divisors is an integer number (54743879514051).

Almost surely, 2^{213213004423109} is an apocalyptic number.

It is an amenable number.

213213004423109 is a deficient number, since it is larger than the sum of its proper divisors (5762513633095).

213213004423109 is an equidigital number, since it uses as much as digits as its factorization.

213213004423109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5762513633094.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 213213004423109 in words is "two hundred thirteen trillion, two hundred thirteen billion, four million, four hundred twenty-three thousand, one hundred nine".