213042111 has 16 divisors (see below), whose sum is σ = 288870528. Its totient is φ = 139629600.

The previous prime is 213042107. The next prime is 213042121. The reversal of 213042111 is 111240312.

It is not a de Polignac number, because 213042111 - 2² = 213042107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213042121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164376 + ... + 165666.

It is an arithmetic number, because the mean of its divisors is an integer number (18054408).

Almost surely, 2^213042111 is an apocalyptic number.

213042111 is a deficient number, since it is larger than the sum of its proper divisors (75828417).

213042111 is a wasteful number, since it uses less digits than its factorization.

213042111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2182.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 213042111 is about 14595.9621471145. The cubic root of 213042111 is about 597.2486163208.

Adding to 213042111 its reverse (111240312), we get a palindrome (324282423).

The spelling of 213042111 in words is "two hundred thirteen million, forty-two thousand, one hundred eleven".