1216016681047 has 8 divisors (see below), whose sum is σ = 1389769150752. Its totient is φ = 1042273161600.

The previous prime is 1216016680939. The next prime is 1216016681083. The reversal of 1216016681047 is 7401866106121.

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

It is a cyclic number.

It is not a de Polignac number, because 1216016681047 - 2⁷ = 1216016680919 is a prime.

It is a super-2 number, since 2×1216016681047² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1216016680994 and 1216016681012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216016681647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943854 + ... + 2492107.

It is an arithmetic number, because the mean of its divisors is an integer number (173721143844).

Almost surely, 2^{1216016681047} is an apocalyptic number.

1216016681047 is a deficient number, since it is larger than the sum of its proper divisors (173752469705).

1216016681047 is an equidigital number, since it uses as much as digits as its factorization.

1216016681047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4475129.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 1216016681047 in words is "one trillion, two hundred sixteen billion, sixteen million, six hundred eighty-one thousand, forty-seven".