10202021 has 2 divisors, whose sum is σ = 10202022. Its totient is φ = 10202020.

The previous prime is 10202009. The next prime is 10202063. The reversal of 10202021 is 12020201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10176100 + 25921 = 3190^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202021 - 2⁶ = 10201957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101010 + 5101011.

It is an arithmetic number, because the mean of its divisors is an integer number (5101011).

Almost surely, 2^10202021 is an apocalyptic number.

It is an amenable number.

10202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202021 is an equidigital number, since it uses as much as digits as its factorization.

10202021 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 8.

The square root of 10202021 is about 3194.0602686862. The cubic root of 10202021 is about 216.8846109403.

Adding to 10202021 its reverse (12020201), we get a palindrome (22222222).

The spelling of 10202021 in words is "ten million, two hundred two thousand, twenty-one".