212105116253 has 2 divisors, whose sum is σ = 212105116254. Its totient is φ = 212105116252.

The previous prime is 212105116243. The next prime is 212105116273. The reversal of 212105116253 is 352611501212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135510125689 + 76594990564 = 368117^2 + 276758^2 .

It is a cyclic number.

It is not a de Polignac number, because 212105116253 - 2⁸ = 212105115997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212105116243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106052558126 + 106052558127.

It is an arithmetic number, because the mean of its divisors is an integer number (106052558127).

Almost surely, 2^212105116253 is an apocalyptic number.

It is an amenable number.

212105116253 is a deficient number, since it is larger than the sum of its proper divisors (1).

212105116253 is an equidigital number, since it uses as much as digits as its factorization.

212105116253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 212105116253 its reverse (352611501212), we get a palindrome (564716617465).

The spelling of 212105116253 in words is "two hundred twelve billion, one hundred five million, one hundred sixteen thousand, two hundred fifty-three".