212210012257 has 2 divisors, whose sum is σ = 212210012258. Its totient is φ = 212210012256.

The previous prime is 212210012219. The next prime is 212210012281. The reversal of 212210012257 is 752210012212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205790156881 + 6419855376 = 453641^2 + 80124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212210012257 is a prime.

It is not a weakly prime, because it can be changed into another prime (212210012207) 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, 106105006128 + 106105006129.

It is an arithmetic number, because the mean of its divisors is an integer number (106105006129).

Almost surely, 2^212210012257 is an apocalyptic number.

It is an amenable number.

212210012257 is a deficient number, since it is larger than the sum of its proper divisors (1).

212210012257 is an equidigital number, since it uses as much as digits as its factorization.

212210012257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

Adding to 212210012257 its reverse (752210012212), we get a palindrome (964420024469).

The spelling of 212210012257 in words is "two hundred twelve billion, two hundred ten million, twelve thousand, two hundred fifty-seven".