212242242187 has 2 divisors, whose sum is σ = 212242242188. Its totient is φ = 212242242186.

The previous prime is 212242242181. The next prime is 212242242217. The reversal of 212242242187 is 781242242212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212242242187 - 2²⁷ = 212108024459 is a prime.

It is not a weakly prime, because it can be changed into another prime (212242242181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106121121093 + 106121121094.

It is an arithmetic number, because the mean of its divisors is an integer number (106121121094).

Almost surely, 2^212242242187 is an apocalyptic number.

212242242187 is a deficient number, since it is larger than the sum of its proper divisors (1).

212242242187 is an equidigital number, since it uses as much as digits as its factorization.

212242242187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57344, while the sum is 37.

Adding to 212242242187 its reverse (781242242212), we get a palindrome (993484484399).

The spelling of 212242242187 in words is "two hundred twelve billion, two hundred forty-two million, two hundred forty-two thousand, one hundred eighty-seven".