213435023221111 has 4 divisors (see below), whose sum is σ = 213435505696824. Its totient is φ = 213434540745400.

The previous prime is 213435023221109. The next prime is 213435023221117. The reversal of 213435023221111 is 111122320534312.

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 213435023221111 - 2¹ = 213435023221109 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 (213435023221117) 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, 240573685 + ... + 241459246.

It is an arithmetic number, because the mean of its divisors is an integer number (53358876424206).

Almost surely, 2^{213435023221111} is an apocalyptic number.

213435023221111 is a deficient number, since it is larger than the sum of its proper divisors (482475713).

213435023221111 is an equidigital number, since it uses as much as digits as its factorization.

213435023221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482475712.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 213435023221111 its reverse (111122320534312), we get a palindrome (324557343755423).

The spelling of 213435023221111 in words is "two hundred thirteen trillion, four hundred thirty-five billion, twenty-three million, two hundred twenty-one thousand, one hundred eleven".