10211021020021 has 2 divisors, whose sum is σ = 10211021020022. Its totient is φ = 10211021020020.

The previous prime is 10211021019967. The next prime is 10211021020033. The reversal of 10211021020021 is 12002012011201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9984241246225 + 226779773796 = 3159785^2 + 476214^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211021020021 - 2³¹ = 10208873536373 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10211021019983 and 10211021020010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211021020091) 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, 5105510510010 + 5105510510011.

It is an arithmetic number, because the mean of its divisors is an integer number (5105510510011).

Almost surely, 2^{10211021020021} is an apocalyptic number.

It is an amenable number.

10211021020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211021020021 is an equidigital number, since it uses as much as digits as its factorization.

10211021020021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10211021020021 its reverse (12002012011201), we get a palindrome (22213033031222).

The spelling of 10211021020021 in words is "ten trillion, two hundred eleven billion, twenty-one million, twenty thousand, twenty-one".