6561012212 has 12 divisors (see below), whose sum is σ = 11557810656. Its totient is φ = 3258780600.

The previous prime is 6561012209. The next prime is 6561012221. The reversal of 6561012212 is 2122101656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5430698 + ... + 5431905.

It is an arithmetic number, because the mean of its divisors is an integer number (963150888).

Almost surely, 2^6561012212 is an apocalyptic number.

It is an amenable number.

6561012212 is a deficient number, since it is larger than the sum of its proper divisors (4996798444).

6561012212 is a wasteful number, since it uses less digits than its factorization.

6561012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10862758 (or 10862756 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 6561012212 is about 81000.0753826810. The cubic root of 6561012212 is about 1872.0766022450.

Adding to 6561012212 its reverse (2122101656), we get a palindrome (8683113868).

The spelling of 6561012212 in words is "six billion, five hundred sixty-one million, twelve thousand, two hundred twelve".