2116331312225 has 24 divisors (see below), whose sum is σ = 2826186320832. Its totient is φ = 1562790542400.

The previous prime is 2116331312119. The next prime is 2116331312257. The reversal of 2116331312225 is 5222131336112.

It is not a de Polignac number, because 2116331312225 - 2³⁴ = 2099151443041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2116331312191 and 2116331312200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26034494 + ... + 26115656.

It is an arithmetic number, because the mean of its divisors is an integer number (117757763368).

Almost surely, 2^{2116331312225} is an apocalyptic number.

2116331312225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2116331312225 is a deficient number, since it is larger than the sum of its proper divisors (709855008607).

2116331312225 is a wasteful number, since it uses less digits than its factorization.

2116331312225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161417 (or 161412 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

Adding to 2116331312225 its reverse (5222131336112), we get a palindrome (7338462648337).

The spelling of 2116331312225 in words is "two trillion, one hundred sixteen billion, three hundred thirty-one million, three hundred twelve thousand, two hundred twenty-five".