10020200021009 has 2 divisors, whose sum is σ = 10020200021010. Its totient is φ = 10020200021008.

The previous prime is 10020200020991. The next prime is 10020200021011. The reversal of 10020200021009 is 90012000202001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6982489153600 + 3037710867409 = 2642440^2 + 1742903^2 .

It is an emirp because it is prime and its reverse (90012000202001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10020200021009 - 2²⁴ = 10020183243793 is a prime.

It is a super-2 number, since 2×10020200021009² (a number of 27 digits) contains 22 as substring.

Together with 10020200021011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10020200021089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010100010504 + 5010100010505.

It is an arithmetic number, because the mean of its divisors is an integer number (5010100010505).

Almost surely, 2^{10020200021009} is an apocalyptic number.

It is an amenable number.

10020200021009 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020200021009 is an equidigital number, since it uses as much as digits as its factorization.

10020200021009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 10020200021009 in words is "ten trillion, twenty billion, two hundred million, twenty-one thousand, nine".