212131187 has 2 divisors, whose sum is σ = 212131188. Its totient is φ = 212131186.

The previous prime is 212131133. The next prime is 212131189. The reversal of 212131187 is 781131212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212131187 - 2⁶ = 212131123 is a prime.

Together with 212131189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212131189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106065593 + 106065594.

It is an arithmetic number, because the mean of its divisors is an integer number (106065594).

Almost surely, 2^212131187 is an apocalyptic number.

212131187 is a deficient number, since it is larger than the sum of its proper divisors (1).

212131187 is an equidigital number, since it uses as much as digits as its factorization.

212131187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 26.

The square root of 212131187 is about 14564.7240619244. The cubic root of 212131187 is about 596.3961630106.

Adding to 212131187 its reverse (781131212), we get a palindrome (993262399).

The spelling of 212131187 in words is "two hundred twelve million, one hundred thirty-one thousand, one hundred eighty-seven".