1020020212009 has 2 divisors, whose sum is σ = 1020020212010. Its totient is φ = 1020020212008.

The previous prime is 1020020211961. The next prime is 1020020212019. The reversal of 1020020212009 is 9002120200201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 651240930025 + 368779281984 = 806995^2 + 607272^2 .

It is an emirp because it is prime and its reverse (9002120200201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020020212009 - 2¹³ = 1020020203817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020020212019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510010106004 + 510010106005.

It is an arithmetic number, because the mean of its divisors is an integer number (510010106005).

Almost surely, 2^{1020020212009} is an apocalyptic number.

It is an amenable number.

1020020212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020020212009 is an equidigital number, since it uses as much as digits as its factorization.

1020020212009 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 1020020212009 in words is "one trillion, twenty billion, twenty million, two hundred twelve thousand, nine".