20211211002109 has 8 divisors (see below), whose sum is σ = 20214584743808. Its totient is φ = 20207837512800.

The previous prime is 20211211002071. The next prime is 20211211002113. The reversal of 20211211002109 is 90120011211202.

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 20211211002109 - 2²³ = 20211202613501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20211211002109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211211032109) 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, 219959194 + ... + 220051060.

It is an arithmetic number, because the mean of its divisors is an integer number (2526823092976).

Almost surely, 2^{20211211002109} is an apocalyptic number.

It is an amenable number.

20211211002109 is a deficient number, since it is larger than the sum of its proper divisors (3373741699).

20211211002109 is an equidigital number, since it uses as much as digits as its factorization.

20211211002109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126195.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 20211211002109 in words is "twenty trillion, two hundred eleven billion, two hundred eleven million, two thousand, one hundred nine".