20310021323021 has 2 divisors, whose sum is σ = 20310021323022. Its totient is φ = 20310021323020.

The previous prime is 20310021322967. The next prime is 20310021323047. The reversal of 20310021323021 is 12032312001302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16190282401225 + 4119738921796 = 4023715^2 + 2029714^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310021323021 - 2⁶ = 20310021322957 is a prime.

It is a super-2 number, since 2×20310021323021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20310021322984 and 20310021323002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20310021328021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155010661510 + 10155010661511.

It is an arithmetic number, because the mean of its divisors is an integer number (10155010661511).

Almost surely, 2^{20310021323021} is an apocalyptic number.

It is an amenable number.

20310021323021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310021323021 is an equidigital number, since it uses as much as digits as its factorization.

20310021323021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20310021323021 its reverse (12032312001302), we get a palindrome (32342333324323).

The spelling of 20310021323021 in words is "twenty trillion, three hundred ten billion, twenty-one million, three hundred twenty-three thousand, twenty-one".