20311304201 has 2 divisors, whose sum is σ = 20311304202. Its totient is φ = 20311304200.

The previous prime is 20311304137. The next prime is 20311304213. The reversal of 20311304201 is 10240311302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17207142976 + 3104161225 = 131176^2 + 55715^2 .

It is a cyclic number.

It is not a de Polignac number, because 20311304201 - 2⁶ = 20311304137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20311304201.

It is not a weakly prime, because it can be changed into another prime (20311304701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155652100 + 10155652101.

It is an arithmetic number, because the mean of its divisors is an integer number (10155652101).

Almost surely, 2^20311304201 is an apocalyptic number.

It is an amenable number.

20311304201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311304201 is an equidigital number, since it uses as much as digits as its factorization.

20311304201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20311304201 its reverse (10240311302), we get a palindrome (30551615503).

The spelling of 20311304201 in words is "twenty billion, three hundred eleven million, three hundred four thousand, two hundred one".