212012561545 has 16 divisors (see below), whose sum is σ = 258183712512. Its totient is φ = 167102732160.

The previous prime is 212012561521. The next prime is 212012561561. The reversal of 212012561545 is 545165210212.

It is not a de Polignac number, because 212012561545 - 2⁷ = 212012561417 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212012561545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13714 + ... + 651316.

It is an arithmetic number, because the mean of its divisors is an integer number (16136482032).

Almost surely, 2^212012561545 is an apocalyptic number.

It is an amenable number.

212012561545 is a deficient number, since it is larger than the sum of its proper divisors (46171150967).

212012561545 is an equidigital number, since it uses as much as digits as its factorization.

212012561545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638592.

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 212012561545 its reverse (545165210212), we get a palindrome (757177771757).

The spelling of 212012561545 in words is "two hundred twelve billion, twelve million, five hundred sixty-one thousand, five hundred forty-five".