2012020120309 has 2 divisors, whose sum is σ = 2012020120310. Its totient is φ = 2012020120308.

The previous prime is 2012020120289. The next prime is 2012020120337. The reversal of 2012020120309 is 9030210202102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1669535331025 + 342484789284 = 1292105^2 + 585222^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012020120309 - 2⁹ = 2012020119797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2012020120309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012020120349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006010060154 + 1006010060155.

It is an arithmetic number, because the mean of its divisors is an integer number (1006010060155).

Almost surely, 2^{2012020120309} is an apocalyptic number.

It is an amenable number.

2012020120309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012020120309 is an equidigital number, since it uses as much as digits as its factorization.

2012020120309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 2012020120309 in words is "two trillion, twelve billion, twenty million, one hundred twenty thousand, three hundred nine".