212230021387 has 2 divisors, whose sum is σ = 212230021388. Its totient is φ = 212230021386.

The previous prime is 212230021327. The next prime is 212230021403. The reversal of 212230021387 is 783120032212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212230021387 is a prime.

It is not a weakly prime, because it can be changed into another prime (212230021327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106115010693 + 106115010694.

It is an arithmetic number, because the mean of its divisors is an integer number (106115010694).

Almost surely, 2^212230021387 is an apocalyptic number.

212230021387 is a deficient number, since it is larger than the sum of its proper divisors (1).

212230021387 is an equidigital number, since it uses as much as digits as its factorization.

212230021387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 212230021387 its reverse (783120032212), we get a palindrome (995350053599).

The spelling of 212230021387 in words is "two hundred twelve billion, two hundred thirty million, twenty-one thousand, three hundred eighty-seven".