212064314661 has 12 divisors (see below), whose sum is σ = 322436969920. Its totient is φ = 133935356520.

The previous prime is 212064314653. The next prime is 212064314687. The reversal of 212064314661 is 166413460212.

212064314661 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 643 + 1 + 4 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 212064314661 - 2³ = 212064314653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212064314641) 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 11 ways as a sum of consecutive naturals, for example, 620070925 + ... + 620071266.

Almost surely, 2^212064314661 is an apocalyptic number.

It is an amenable number.

212064314661 is a deficient number, since it is larger than the sum of its proper divisors (110372655259).

212064314661 is a wasteful number, since it uses less digits than its factorization.

212064314661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240142216 (or 1240142213 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

Adding to 212064314661 its reverse (166413460212), we get a palindrome (378477774873).

The spelling of 212064314661 in words is "two hundred twelve billion, sixty-four million, three hundred fourteen thousand, six hundred sixty-one".