212100566545 has 16 divisors (see below), whose sum is σ = 297645448320. Its totient is φ = 142058052864.

The previous prime is 212100566519. The next prime is 212100566551. The reversal of 212100566545 is 545665001212.

It is not a de Polignac number, because 212100566545 - 2¹¹ = 212100564497 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 70463800 + ... + 70466809.

It is an arithmetic number, because the mean of its divisors is an integer number (18602840520).

Almost surely, 2^212100566545 is an apocalyptic number.

It is an amenable number.

212100566545 is a deficient number, since it is larger than the sum of its proper divisors (85544881775).

212100566545 is a wasteful number, since it uses less digits than its factorization.

212100566545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140930664.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 212100566545 its reverse (545665001212), we get a palindrome (757765567757).

The spelling of 212100566545 in words is "two hundred twelve billion, one hundred million, five hundred sixty-six thousand, five hundred forty-five".