20201221110001 has 8 divisors (see below), whose sum is σ = 20875763524608. Its totient is φ = 19528109328000.

The previous prime is 20201221109941. The next prime is 20201221110011. The reversal of 20201221110001 is 10001112210202.

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 20201221110001 - 2³⁷ = 20063782156529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201221110011) 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, 357629440 + ... + 357685921.

It is an arithmetic number, because the mean of its divisors is an integer number (2609470440576).

Almost surely, 2^{20201221110001} is an apocalyptic number.

It is an amenable number.

20201221110001 is a deficient number, since it is larger than the sum of its proper divisors (674542414607).

20201221110001 is an equidigital number, since it uses as much as digits as its factorization.

20201221110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715316303.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20201221110001 its reverse (10001112210202), we get a palindrome (30202333320203).

The spelling of 20201221110001 in words is "twenty trillion, two hundred one billion, two hundred twenty-one million, one hundred ten thousand, one".