2121316147 has 4 divisors (see below), whose sum is σ = 2121552400. Its totient is φ = 2121079896.

The previous prime is 2121316103. The next prime is 2121316159. The reversal of 2121316147 is 7416131212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121316147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121316247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104103 + ... + 122800.

It is an arithmetic number, because the mean of its divisors is an integer number (530388100).

Almost surely, 2^2121316147 is an apocalyptic number.

2121316147 is a deficient number, since it is larger than the sum of its proper divisors (236253).

2121316147 is an equidigital number, since it uses as much as digits as its factorization.

2121316147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236252.

The product of its digits is 2016, while the sum is 28.

The square root of 2121316147 is about 46057.7479584054. The cubic root of 2121316147 is about 1284.8974461298.

Adding to 2121316147 its reverse (7416131212), we get a palindrome (9537447359).

The spelling of 2121316147 in words is "two billion, one hundred twenty-one million, three hundred sixteen thousand, one hundred forty-seven".