2010021002009 has 2 divisors, whose sum is σ = 2010021002010. Its totient is φ = 2010021002008.

The previous prime is 2010021001999. The next prime is 2010021002023. The reversal of 2010021002009 is 9002001200102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1479531649600 + 530489352409 = 1216360^2 + 728347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2010021002009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2010021082009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005010501004 + 1005010501005.

It is an arithmetic number, because the mean of its divisors is an integer number (1005010501005).

Almost surely, 2^{2010021002009} is an apocalyptic number.

It is an amenable number.

2010021002009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2010021002009 is an equidigital number, since it uses as much as digits as its factorization.

2010021002009 is an evil number, because the sum of its binary digits is even.

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

The spelling of 2010021002009 in words is "two trillion, ten billion, twenty-one million, two thousand, nine".