20201021101211 has 4 divisors (see below), whose sum is σ = 20201904151632. Its totient is φ = 20200138050792.

The previous prime is 20201021101207. The next prime is 20201021101267. The reversal of 20201021101211 is 11210112010202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20201021101211 - 2² = 20201021101207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201021101291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441490895 + ... + 441536648.

It is an arithmetic number, because the mean of its divisors is an integer number (5050476037908).

Almost surely, 2^{20201021101211} is an apocalyptic number.

20201021101211 is a deficient number, since it is larger than the sum of its proper divisors (883050421).

20201021101211 is an equidigital number, since it uses as much as digits as its factorization.

20201021101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883050420.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20201021101211 its reverse (11210112010202), we get a palindrome (31411133111413).

The spelling of 20201021101211 in words is "twenty trillion, two hundred one billion, twenty-one million, one hundred one thousand, two hundred eleven".