20313130010021 has 2 divisors, whose sum is σ = 20313130010022. Its totient is φ = 20313130010020.

The previous prime is 20313130009943. The next prime is 20313130010077. The reversal of 20313130010021 is 12001003131302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17926027759396 + 2387102250625 = 4233914^2 + 1545025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20313130010021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20313130010321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156565005010 + 10156565005011.

It is an arithmetic number, because the mean of its divisors is an integer number (10156565005011).

Almost surely, 2^{20313130010021} is an apocalyptic number.

It is an amenable number.

20313130010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313130010021 is an equidigital number, since it uses as much as digits as its factorization.

20313130010021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20313130010021 its reverse (12001003131302), we get a palindrome (32314133141323).

The spelling of 20313130010021 in words is "twenty trillion, three hundred thirteen billion, one hundred thirty million, ten thousand, twenty-one".