2012100221009 has 4 divisors (see below), whose sum is σ = 2012138538816. Its totient is φ = 2012061903204.

The previous prime is 2012100220997. The next prime is 2012100221017. The reversal of 2012100221009 is 9001220012102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2012100221009 - 2¹⁶ = 2012100155473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2012100221059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19080029 + ... + 19185194.

It is an arithmetic number, because the mean of its divisors is an integer number (503034634704).

Almost surely, 2^{2012100221009} is an apocalyptic number.

It is an amenable number.

2012100221009 is a deficient number, since it is larger than the sum of its proper divisors (38317807).

2012100221009 is an equidigital number, since it uses as much as digits as its factorization.

2012100221009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38317806.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 2012100221009 in words is "two trillion, twelve billion, one hundred million, two hundred twenty-one thousand, nine".