16502136121 has 8 divisors (see below), whose sum is σ = 16715916800. Its totient is φ = 16288477920.

The previous prime is 16502136109. The next prime is 16502136151. The reversal of 16502136121 is 12163120561.

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 16502136121 - 2⁹ = 16502135609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16502136121.

It is not an unprimeable number, because it can be changed into a prime (16502136151) 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, 258085 + ... + 315613.

It is an arithmetic number, because the mean of its divisors is an integer number (2089489600).

Almost surely, 2^16502136121 is an apocalyptic number.

It is an amenable number.

16502136121 is a deficient number, since it is larger than the sum of its proper divisors (213780679).

16502136121 is an equidigital number, since it uses as much as digits as its factorization.

16502136121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61239.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 16502136121 its reverse (12163120561), we get a palindrome (28665256682).

The spelling of 16502136121 in words is "sixteen billion, five hundred two million, one hundred thirty-six thousand, one hundred twenty-one".