1002120002189 has 2 divisors, whose sum is σ = 1002120002190. Its totient is φ = 1002120002188.

The previous prime is 1002120002183. The next prime is 1002120002269. The reversal of 1002120002189 is 9812000212001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 577645600900 + 424474401289 = 760030^2 + 651517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002120002189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002120002183) 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, 501060001094 + 501060001095.

It is an arithmetic number, because the mean of its divisors is an integer number (501060001095).

Almost surely, 2^{1002120002189} is an apocalyptic number.

It is an amenable number.

1002120002189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002120002189 is an equidigital number, since it uses as much as digits as its factorization.

1002120002189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 1002120002189 in words is "one trillion, two billion, one hundred twenty million, two thousand, one hundred eighty-nine".