7217161212120 has 64 divisors (see below), whose sum is σ = 21651750666720. Its totient is φ = 1924552587264.

The previous prime is 7217161212119. The next prime is 7217161212133. The reversal of 7217161212120 is 212121617127.

It is a congruent number.

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, 10794294 + ... + 11443386.

Almost surely, 2^{7217161212120} is an apocalyptic number.

It is an amenable number.

7217161212120 is an abundant number, since it is smaller than the sum of its proper divisors (14434589454600).

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

7217161212120 is a wasteful number, since it uses less digits than its factorization.

7217161212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741764 (or 741760 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 33.

Adding to 7217161212120 its reverse (212121617127), we get a palindrome (7429282829247).

The spelling of 7217161212120 in words is "seven trillion, two hundred seventeen billion, one hundred sixty-one million, two hundred twelve thousand, one hundred twenty".