2012012201909 has 2 divisors, whose sum is σ = 2012012201910. Its totient is φ = 2012012201908.

The previous prime is 2012012201873. The next prime is 2012012202023. The reversal of 2012012201909 is 9091022102102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1595345824900 + 416666377009 = 1263070^2 + 645497^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012012201909 - 2³² = 2007717234613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2012012201509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006006100954 + 1006006100955.

It is an arithmetic number, because the mean of its divisors is an integer number (1006006100955).

Almost surely, 2^{2012012201909} is an apocalyptic number.

It is an amenable number.

2012012201909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012012201909 is an equidigital number, since it uses as much as digits as its factorization.

2012012201909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 2012012201909 in words is "two trillion, twelve billion, twelve million, two hundred one thousand, nine hundred nine".