212125361 has 6 divisors (see below), whose sum is σ = 246758130. Its totient is φ = 181821696.

The previous prime is 212125313. The next prime is 212125379. The reversal of 212125361 is 163521212.

It can be written as a sum of positive squares in only one way, i.e., 197571136 + 14554225 = 14056^2 + 3815^2 .

It is not a de Polignac number, because 212125361 - 2¹⁰ = 212124337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212125961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2164496 + ... + 2164593.

It is an arithmetic number, because the mean of its divisors is an integer number (41126355).

Almost surely, 2^212125361 is an apocalyptic number.

It is an amenable number.

212125361 is a deficient number, since it is larger than the sum of its proper divisors (34632769).

212125361 is an equidigital number, since it uses as much as digits as its factorization.

212125361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329103 (or 4329096 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 212125361 is about 14564.5240567620. The cubic root of 212125361 is about 596.3907031253.

Adding to 212125361 its reverse (163521212), we get a palindrome (375646573).

The spelling of 212125361 in words is "two hundred twelve million, one hundred twenty-five thousand, three hundred sixty-one".