20012231017 has 2 divisors, whose sum is σ = 20012231018. Its totient is φ = 20012231016.

The previous prime is 20012230993. The next prime is 20012231027. The reversal of 20012231017 is 71013221002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16561373481 + 3450857536 = 128691^2 + 58744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012231017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012230985 and 20012231003.

It is not a weakly prime, because it can be changed into another prime (20012231027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006115508 + 10006115509.

It is an arithmetic number, because the mean of its divisors is an integer number (10006115509).

Almost surely, 2^20012231017 is an apocalyptic number.

It is an amenable number.

20012231017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012231017 is an equidigital number, since it uses as much as digits as its factorization.

20012231017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

Adding to 20012231017 its reverse (71013221002), we get a palindrome (91025452019).

The spelling of 20012231017 in words is "twenty billion, twelve million, two hundred thirty-one thousand, seventeen".