16121330117 has 4 divisors (see below), whose sum is σ = 16641373056. Its totient is φ = 15601287180.

The previous prime is 16121330087. The next prime is 16121330143. The reversal of 16121330117 is 71103312161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16121330117 - 2²² = 16117135813 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 (16121330167) 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, 260021423 + ... + 260021484.

It is an arithmetic number, because the mean of its divisors is an integer number (4160343264).

Almost surely, 2^16121330117 is an apocalyptic number.

It is an amenable number.

16121330117 is a deficient number, since it is larger than the sum of its proper divisors (520042939).

16121330117 is an equidigital number, since it uses as much as digits as its factorization.

16121330117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520042938.

The product of its (nonzero) digits is 756, while the sum is 26.

Adding to 16121330117 its reverse (71103312161), we get a palindrome (87224642278).

The spelling of 16121330117 in words is "sixteen billion, one hundred twenty-one million, three hundred thirty thousand, one hundred seventeen".