20011201001209 has 8 divisors (see below), whose sum is σ = 21832125740640. Its totient is φ = 18190563703200.

The previous prime is 20011201001191. The next prime is 20011201001219. The reversal of 20011201001209 is 90210010211002.

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 20011201001209 - 2³³ = 20002611066617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011201001219) 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, 71714772 + ... + 71993269.

It is an arithmetic number, because the mean of its divisors is an integer number (2729015717580).

Almost surely, 2^{20011201001209} is an apocalyptic number.

It is an amenable number.

20011201001209 is a deficient number, since it is larger than the sum of its proper divisors (1820924739431).

20011201001209 is a wasteful number, since it uses less digits than its factorization.

20011201001209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143720711.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 20011201001209 in words is "twenty trillion, eleven billion, two hundred one million, one thousand, two hundred nine".