21611061061117 has 8 divisors (see below), whose sum is σ = 24077313677952. Its totient is φ = 19228410228000.

The previous prime is 21611061060989. The next prime is 21611061061123. The reversal of 21611061061117 is 71116016011612.

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 21611061061117 - 2⁷ = 21611061060989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21611061061157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20900445384 + ... + 20900446417.

It is an arithmetic number, because the mean of its divisors is an integer number (3009664209744).

Almost surely, 2^{21611061061117} is an apocalyptic number.

It is an amenable number.

21611061061117 is a deficient number, since it is larger than the sum of its proper divisors (2466252616835).

21611061061117 is a wasteful number, since it uses less digits than its factorization.

21611061061117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41800891859.

The product of its (nonzero) digits is 3024, while the sum is 34.

Adding to 21611061061117 its reverse (71116016011612), we get a palindrome (92727077072729).

It can be divided in two parts, 2161106 and 1061117, that added together give a palindrome (3222223).

The spelling of 21611061061117 in words is "twenty-one trillion, six hundred eleven billion, sixty-one million, sixty-one thousand, one hundred seventeen".