212113189 has 2 divisors, whose sum is σ = 212113190. Its totient is φ = 212113188.

The previous prime is 212113171. The next prime is 212113219. The reversal of 212113189 is 981311212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126180289 + 85932900 = 11233^2 + 9270^2 .

It is a cyclic number.

It is not a de Polignac number, because 212113189 - 2⁵ = 212113157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212113589) 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, 106056594 + 106056595.

It is an arithmetic number, because the mean of its divisors is an integer number (106056595).

Almost surely, 2^212113189 is an apocalyptic number.

It is an amenable number.

212113189 is a deficient number, since it is larger than the sum of its proper divisors (1).

212113189 is an equidigital number, since it uses as much as digits as its factorization.

212113189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 28.

The square root of 212113189 is about 14564.1061861001. The cubic root of 212113189 is about 596.3792957096.

The spelling of 212113189 in words is "two hundred twelve million, one hundred thirteen thousand, one hundred eighty-nine".