1217520216642 has 8 divisors (see below), whose sum is σ = 2435040433296. Its totient is φ = 405840072212.

The previous prime is 1217520216629. The next prime is 1217520216683. The reversal of 1217520216642 is 2466120257121.

It is a sphenic number, since it is the product of 3 distinct primes.

1217520216642 is an admirable number.

It is a super-2 number, since 2×1217520216642² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1217520216642.

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, 101460018048 + ... + 101460018059.

It is an arithmetic number, because the mean of its divisors is an integer number (304380054162).

Almost surely, 2^{1217520216642} is an apocalyptic number.

1217520216642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1217520216642 is a wasteful number, since it uses less digits than its factorization.

1217520216642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202920036112.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 1217520216642 in words is "one trillion, two hundred seventeen billion, five hundred twenty million, two hundred sixteen thousand, six hundred forty-two".