20211301211 has 4 divisors (see below), whose sum is σ = 20212881000. Its totient is φ = 20209721424.

The previous prime is 20211301189. The next prime is 20211301261. The reversal of 20211301211 is 11210311202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211301211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211301261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770546 + ... + 796343.

It is an arithmetic number, because the mean of its divisors is an integer number (5053220250).

Almost surely, 2^20211301211 is an apocalyptic number.

20211301211 is a deficient number, since it is larger than the sum of its proper divisors (1579789).

20211301211 is a wasteful number, since it uses less digits than its factorization.

20211301211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579788.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20211301211 its reverse (11210311202), we get a palindrome (31421612413).

Subtracting from 20211301211 its reverse (11210311202), we obtain a palindrome (9000990009).

The spelling of 20211301211 in words is "twenty billion, two hundred eleven million, three hundred one thousand, two hundred eleven".