10202010001021 has 2 divisors, whose sum is σ = 10202010001022. Its totient is φ = 10202010001020.

The previous prime is 10202010001003. The next prime is 10202010001063. The reversal of 10202010001021 is 12010001020201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8752213395396 + 1449796605625 = 2958414^2 + 1204075^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202010001021 - 2³³ = 10193420066429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10202010000989 and 10202010001007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202010001621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101005000510 + 5101005000511.

It is an arithmetic number, because the mean of its divisors is an integer number (5101005000511).

Almost surely, 2^{10202010001021} is an apocalyptic number.

It is an amenable number.

10202010001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202010001021 is an equidigital number, since it uses as much as digits as its factorization.

10202010001021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10202010001021 its reverse (12010001020201), we get a palindrome (22212011021222).

The spelling of 10202010001021 in words is "ten trillion, two hundred two billion, ten million, one thousand, twenty-one".