212221316734680 has 64 divisors (see below), whose sum is σ = 694542491136000. Its totient is φ = 51447591935360.

The previous prime is 212221316734643. The next prime is 212221316734697. The reversal of 212221316734680 is 86437613122212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80386861080 + ... + 80386863719.

It is an arithmetic number, because the mean of its divisors is an integer number (10852226424000).

Almost surely, 2^{212221316734680} is an apocalyptic number.

212221316734680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212221316734680 is an abundant number, since it is smaller than the sum of its proper divisors (482321174401320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212221316734680 is a wasteful number, since it uses less digits than its factorization.

212221316734680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160773724824 (or 160773724820 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

Adding to 212221316734680 its reverse (86437613122212), we get a palindrome (298658929856892).

The spelling of 212221316734680 in words is "two hundred twelve trillion, two hundred twenty-one billion, three hundred sixteen million, seven hundred thirty-four thousand, six hundred eighty".