10202002220021 has 2 divisors, whose sum is σ = 10202002220022. Its totient is φ = 10202002220020.

The previous prime is 10202002219991. The next prime is 10202002220027. The reversal of 10202002220021 is 12002220020201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9973627191025 + 228375028996 = 3158105^2 + 477886^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202002220021 - 2¹⁴ = 10202002203637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10202002219978 and 10202002220005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202002220027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101001110010 + 5101001110011.

It is an arithmetic number, because the mean of its divisors is an integer number (5101001110011).

Almost surely, 2^{10202002220021} is an apocalyptic number.

It is an amenable number.

10202002220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202002220021 is an equidigital number, since it uses as much as digits as its factorization.

10202002220021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 10202002220021 its reverse (12002220020201), we get a palindrome (22204222240222).

The spelling of 10202002220021 in words is "ten trillion, two hundred two billion, two million, two hundred twenty thousand, twenty-one".