2120311601 has 2 divisors, whose sum is σ = 2120311602. Its totient is φ = 2120311600.

The previous prime is 2120311579. The next prime is 2120311643. The reversal of 2120311601 is 1061130212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1258830400 + 861481201 = 35480^2 + 29351^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120311601 - 2⁶ = 2120311537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120311601.

It is not a weakly prime, because it can be changed into another prime (2120311691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060155800 + 1060155801.

It is an arithmetic number, because the mean of its divisors is an integer number (1060155801).

Almost surely, 2^2120311601 is an apocalyptic number.

It is an amenable number.

2120311601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120311601 is an equidigital number, since it uses as much as digits as its factorization.

2120311601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2120311601 is about 46046.8413791869. The cubic root of 2120311601 is about 1284.6945937029.

Adding to 2120311601 its reverse (1061130212), we get a palindrome (3181441813).

The spelling of 2120311601 in words is "two billion, one hundred twenty million, three hundred eleven thousand, six hundred one".