217280669012 has 12 divisors (see below), whose sum is σ = 414808550016. Its totient is φ = 98763940440.

The previous prime is 217280669003. The next prime is 217280669017. The reversal of 217280669012 is 210966082712.

It is a happy number.

It is a super-3 number, since 3×217280669012³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 4938197023 = 217280669012 / (2 + 1 + 7 + 2 + 8 + 0 + 6 + 6 + 9 + 0 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217280669017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2469098468 + ... + 2469098555.

It is an arithmetic number, because the mean of its divisors is an integer number (34567379168).

Almost surely, 2^217280669012 is an apocalyptic number.

217280669012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

217280669012 is a deficient number, since it is larger than the sum of its proper divisors (197527881004).

217280669012 is a wasteful number, since it uses less digits than its factorization.

217280669012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4938197038 (or 4938197036 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 217280669012 in words is "two hundred seventeen billion, two hundred eighty million, six hundred sixty-nine thousand, twelve".