20116121507731 has 8 divisors (see below), whose sum is σ = 22095511038720. Its totient is φ = 18228796606152.

The previous prime is 20116121507717. The next prime is 20116121507749. The reversal of 20116121507731 is 13770512161102.

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 20116121507731 - 2⁹ = 20116121507219 is a prime.

It is a super-2 number, since 2×20116121507731² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20116121507701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23016156895 + ... + 23016157768.

It is an arithmetic number, because the mean of its divisors is an integer number (2761938879840).

Almost surely, 2^{20116121507731} is an apocalyptic number.

20116121507731 is a deficient number, since it is larger than the sum of its proper divisors (1979389530989).

20116121507731 is a wasteful number, since it uses less digits than its factorization.

20116121507731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46032314705.

The product of its (nonzero) digits is 17640, while the sum is 37.

Adding to 20116121507731 its reverse (13770512161102), we get a palindrome (33886633668833).

The spelling of 20116121507731 in words is "twenty trillion, one hundred sixteen billion, one hundred twenty-one million, five hundred seven thousand, seven hundred thirty-one".