213111061 has 2 divisors, whose sum is σ = 213111062. Its totient is φ = 213111060.

The previous prime is 213111043. The next prime is 213111131. The reversal of 213111061 is 160111312.

213111061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188210961 + 24900100 = 13719^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 213111061 - 2²⁷ = 78893333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213111001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106555530 + 106555531.

It is an arithmetic number, because the mean of its divisors is an integer number (106555531).

Almost surely, 2^213111061 is an apocalyptic number.

It is an amenable number.

213111061 is a deficient number, since it is larger than the sum of its proper divisors (1).

213111061 is an equidigital number, since it uses as much as digits as its factorization.

213111061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 213111061 is about 14598.3239106412. The cubic root of 213111061 is about 597.3130415340.

Adding to 213111061 its reverse (160111312), we get a palindrome (373222373).

The spelling of 213111061 in words is "two hundred thirteen million, one hundred eleven thousand, sixty-one".