10202013020021 has 2 divisors, whose sum is σ = 10202013020022. Its totient is φ = 10202013020020.

The previous prime is 10202013019993. The next prime is 10202013020029. The reversal of 10202013020021 is 12002031020201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9653355790225 + 548657229796 = 3106985^2 + 740714^2 .

It is an emirp because it is prime and its reverse (12002031020201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10202013020021 - 2¹⁸ = 10202012757877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10202013019978 and 10202013020005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202013020029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101006510010 + 5101006510011.

It is an arithmetic number, because the mean of its divisors is an integer number (5101006510011).

Almost surely, 2^{10202013020021} is an apocalyptic number.

It is an amenable number.

10202013020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202013020021 is an equidigital number, since it uses as much as digits as its factorization.

10202013020021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10202013020021 its reverse (12002031020201), we get a palindrome (22204044040222).

The spelling of 10202013020021 in words is "ten trillion, two hundred two billion, thirteen million, twenty thousand, twenty-one".