20212011211 has 4 divisors (see below), whose sum is σ = 23099441392. Its totient is φ = 17324581032.

The previous prime is 20212011179. The next prime is 20212011221. The reversal of 20212011211 is 11211021202.

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 20212011211 - 2⁵ = 20212011179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212011191 and 20212011200.

It is not an unprimeable number, because it can be changed into a prime (20212011221) 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, 1443715080 + ... + 1443715093.

It is an arithmetic number, because the mean of its divisors is an integer number (5774860348).

Almost surely, 2^20212011211 is an apocalyptic number.

20212011211 is a deficient number, since it is larger than the sum of its proper divisors (2887430181).

20212011211 is an equidigital number, since it uses as much as digits as its factorization.

20212011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887430180.

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

Adding to 20212011211 its reverse (11211021202), we get a palindrome (31423032413).

Subtracting from 20212011211 its reverse (11211021202), we obtain a palindrome (9000990009).

The spelling of 20212011211 in words is "twenty billion, two hundred twelve million, eleven thousand, two hundred eleven".