213111043 has 2 divisors, whose sum is σ = 213111044. Its totient is φ = 213111042.

The previous prime is 213111013. The next prime is 213111061. The reversal of 213111043 is 340111312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213111043 is a prime.

It is not a weakly prime, because it can be changed into another prime (213111013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106555521 + 106555522.

It is an arithmetic number, because the mean of its divisors is an integer number (106555522).

Almost surely, 2^213111043 is an apocalyptic number.

213111043 is a deficient number, since it is larger than the sum of its proper divisors (1).

213111043 is an equidigital number, since it uses as much as digits as its factorization.

213111043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 213111043 is about 14598.3232941321. The cubic root of 213111043 is about 597.3130247170.

Adding to 213111043 its reverse (340111312), we get a palindrome (553222355).

The spelling of 213111043 in words is "two hundred thirteen million, one hundred eleven thousand, forty-three".