2021011220009 has 8 divisors (see below), whose sum is σ = 2030798929152. Its totient is φ = 2011229983440.

The previous prime is 2021011219921. The next prime is 2021011220017. The reversal of 2021011220009 is 9000221101202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021011220009 - 2²⁴ = 2020994442793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2021011226009) 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 in 7 ways as a sum of consecutive naturals, for example, 991562 + ... + 2241699.

It is an arithmetic number, because the mean of its divisors is an integer number (253849866144).

Almost surely, 2^{2021011220009} is an apocalyptic number.

It is an amenable number.

2021011220009 is a deficient number, since it is larger than the sum of its proper divisors (9787709143).

2021011220009 is a wasteful number, since it uses less digits than its factorization.

2021011220009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236287.

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

The spelling of 2021011220009 in words is "two trillion, twenty-one billion, eleven million, two hundred twenty thousand, nine".