1020020210789 has 2 divisors, whose sum is σ = 1020020210790. Its totient is φ = 1020020210788.

The previous prime is 1020020210753. The next prime is 1020020210801. The reversal of 1020020210789 is 9870120200201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 934203437764 + 85816773025 = 966542^2 + 292945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020020210789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020020210719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510010105394 + 510010105395.

It is an arithmetic number, because the mean of its divisors is an integer number (510010105395).

Almost surely, 2^{1020020210789} is an apocalyptic number.

It is an amenable number.

1020020210789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020020210789 is an equidigital number, since it uses as much as digits as its factorization.

1020020210789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 1020020210789 in words is "one trillion, twenty billion, twenty million, two hundred ten thousand, seven hundred eighty-nine".