1002020221009 has 2 divisors, whose sum is σ = 1002020221010. Its totient is φ = 1002020221008.

The previous prime is 1002020220983. The next prime is 1002020221117. The reversal of 1002020221009 is 9001220202001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 690826945600 + 311193275409 = 831160^2 + 557847^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002020221009 - 2¹¹ = 1002020218961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1002020228009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501010110504 + 501010110505.

It is an arithmetic number, because the mean of its divisors is an integer number (501010110505).

Almost surely, 2^{1002020221009} is an apocalyptic number.

It is an amenable number.

1002020221009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002020221009 is an equidigital number, since it uses as much as digits as its factorization.

1002020221009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 1002020221009 in words is "one trillion, two billion, twenty million, two hundred twenty-one thousand, nine".