2221021020209 has 8 divisors (see below), whose sum is σ = 2232017818848. Its totient is φ = 2210042475520.

The previous prime is 2221021020137. The next prime is 2221021020221. The reversal of 2221021020209 is 9020201201222.

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 2221021020209 - 2³⁶ = 2152301543473 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 (2221021020299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4319507 + ... + 4806264.

It is an arithmetic number, because the mean of its divisors is an integer number (279002227356).

Almost surely, 2^{2221021020209} is an apocalyptic number.

It is an amenable number.

2221021020209 is a deficient number, since it is larger than the sum of its proper divisors (10996798639).

2221021020209 is an equidigital number, since it uses as much as digits as its factorization.

2221021020209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9126975.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 2221021020209 in words is "two trillion, two hundred twenty-one billion, twenty-one million, twenty thousand, two hundred nine".