11681388111217 has 8 divisors (see below), whose sum is σ = 12827725417152. Its totient is φ = 10549116294000.

The previous prime is 11681388111089. The next prime is 11681388111233. The reversal of 11681388111217 is 71211188318611.

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 11681388111217 - 2⁷ = 11681388111089 is a prime.

It is a super-2 number, since 2×11681388111217² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11681388111017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3516370438 + ... + 3516373759.

It is an arithmetic number, because the mean of its divisors is an integer number (1603465677144).

Almost surely, 2^{11681388111217} is an apocalyptic number.

It is an amenable number.

11681388111217 is a deficient number, since it is larger than the sum of its proper divisors (1146337305935).

11681388111217 is a wasteful number, since it uses less digits than its factorization.

11681388111217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7032744359.

The product of its digits is 129024, while the sum is 49.

The spelling of 11681388111217 in words is "eleven trillion, six hundred eighty-one billion, three hundred eighty-eight million, one hundred eleven thousand, two hundred seventeen".