20201110211021 has 2 divisors, whose sum is σ = 20201110211022. Its totient is φ = 20201110211020.

The previous prime is 20201110210937. The next prime is 20201110211039. The reversal of 20201110211021 is 12011201110202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19960432644100 + 240677566921 = 4467710^2 + 490589^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201110211021 - 2¹⁰ = 20201110209997 is a prime.

It is a super-2 number, since 2×20201110211021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20201110210987 and 20201110211005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201110271021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100555105510 + 10100555105511.

It is an arithmetic number, because the mean of its divisors is an integer number (10100555105511).

Almost surely, 2^{20201110211021} is an apocalyptic number.

It is an amenable number.

20201110211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201110211021 is an equidigital number, since it uses as much as digits as its factorization.

20201110211021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20201110211021 its reverse (12011201110202), we get a palindrome (32212311321223).

The spelling of 20201110211021 in words is "twenty trillion, two hundred one billion, one hundred ten million, two hundred eleven thousand, twenty-one".