16505210122 has 8 divisors (see below), whose sum is σ = 25002942372. Its totient is φ = 8170896000.

The previous prime is 16505210119. The next prime is 16505210129. The reversal of 16505210122 is 22101250561.

16505210122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16491953241 + 13256881 = 128421^2 + 3641^2 .

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

It is a super-2 number, since 2×16505210122² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16505210129) 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 3 ways as a sum of consecutive naturals, for example, 40854279 + ... + 40854682.

Almost surely, 2^16505210122 is an apocalyptic number.

16505210122 is a deficient number, since it is larger than the sum of its proper divisors (8497732250).

16505210122 is a wasteful number, since it uses less digits than its factorization.

16505210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81709064.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 16505210122 its reverse (22101250561), we get a palindrome (38606460683).

The spelling of 16505210122 in words is "sixteen billion, five hundred five million, two hundred ten thousand, one hundred twenty-two".