2120311117 has 2 divisors, whose sum is σ = 2120311118. Its totient is φ = 2120311116.

The previous prime is 2120311033. The next prime is 2120311129. The reversal of 2120311117 is 7111130212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1427252841 + 693058276 = 37779^2 + 26326^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120311117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120311094 and 2120311103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120311177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060155558 + 1060155559.

It is an arithmetic number, because the mean of its divisors is an integer number (1060155559).

Almost surely, 2^2120311117 is an apocalyptic number.

It is an amenable number.

2120311117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120311117 is an equidigital number, since it uses as much as digits as its factorization.

2120311117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 19.

The square root of 2120311117 is about 46046.8361236687. The cubic root of 2120311117 is about 1284.6944959512.

Adding to 2120311117 its reverse (7111130212), we get a palindrome (9231441329).

The spelling of 2120311117 in words is "two billion, one hundred twenty million, three hundred eleven thousand, one hundred seventeen".