16021112117 has 4 divisors (see below), whose sum is σ = 16027063980. Its totient is φ = 16015160256.

The previous prime is 16021112059. The next prime is 16021112119. The reversal of 16021112117 is 71121112061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4417729156 + 11603382961 = 66466^2 + 107719^2 .

It is a cyclic number.

It is not a de Polignac number, because 16021112117 - 2⁸ = 16021111861 is a prime.

It is a super-4 number, since 4×16021112117⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16021112092 and 16021112101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16021112119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2971892 + ... + 2977277.

It is an arithmetic number, because the mean of its divisors is an integer number (4006765995).

Almost surely, 2^16021112117 is an apocalyptic number.

It is an amenable number.

16021112117 is a deficient number, since it is larger than the sum of its proper divisors (5951863).

16021112117 is an equidigital number, since it uses as much as digits as its factorization.

16021112117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5951862.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 16021112117 its reverse (71121112061), we get a palindrome (87142224178).

The spelling of 16021112117 in words is "sixteen billion, twenty-one million, one hundred twelve thousand, one hundred seventeen".