213241111 has 2 divisors, whose sum is σ = 213241112. Its totient is φ = 213241110.

The previous prime is 213241109. The next prime is 213241117. The reversal of 213241111 is 111142312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213241111 - 2¹ = 213241109 is a prime.

Together with 213241109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213241117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106620555 + 106620556.

It is an arithmetic number, because the mean of its divisors is an integer number (106620556).

Almost surely, 2^213241111 is an apocalyptic number.

213241111 is a deficient number, since it is larger than the sum of its proper divisors (1).

213241111 is an equidigital number, since it uses as much as digits as its factorization.

213241111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 16.

The square root of 213241111 is about 14602.7775097753. Note that the first 3 decimals coincide. The cubic root of 213241111 is about 597.4345192972.

Adding to 213241111 its reverse (111142312), we get a palindrome (324383423).

The spelling of 213241111 in words is "two hundred thirteen million, two hundred forty-one thousand, one hundred eleven".