212012102120251 has 2 divisors, whose sum is σ = 212012102120252. Its totient is φ = 212012102120250.

The previous prime is 212012102120249. The next prime is 212012102120261. The reversal of 212012102120251 is 152021201210212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212012102120251 - 2¹ = 212012102120249 is a prime.

Together with 212012102120249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212012102120261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106006051060125 + 106006051060126.

It is an arithmetic number, because the mean of its divisors is an integer number (106006051060126).

Almost surely, 2^{212012102120251} is an apocalyptic number.

212012102120251 is a deficient number, since it is larger than the sum of its proper divisors (1).

212012102120251 is an equidigital number, since it uses as much as digits as its factorization.

212012102120251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 212012102120251 its reverse (152021201210212), we get a palindrome (364033303330463).

The spelling of 212012102120251 in words is "two hundred twelve trillion, twelve billion, one hundred two million, one hundred twenty thousand, two hundred fifty-one".