20212020211 has 4 divisors (see below), whose sum is σ = 20496696624. Its totient is φ = 19927343800.

The previous prime is 20212020133. The next prime is 20212020217. The reversal of 20212020211 is 11202021202.

It is a happy number.

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 20212020211 - 2²³ = 20203631603 is a prime.

It is a super-2 number, since 2×20212020211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212020191 and 20212020200.

It is not an unprimeable number, because it can be changed into a prime (20212020217) 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, 142338100 + ... + 142338241.

It is an arithmetic number, because the mean of its divisors is an integer number (5124174156).

Almost surely, 2^20212020211 is an apocalyptic number.

20212020211 is a deficient number, since it is larger than the sum of its proper divisors (284676413).

20212020211 is an equidigital number, since it uses as much as digits as its factorization.

20212020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284676412.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20212020211 its reverse (11202021202), we get a palindrome (31414041413).

Subtracting from 20212020211 its reverse (11202021202), we obtain a palindrome (9009999009).

The spelling of 20212020211 in words is "twenty billion, two hundred twelve million, twenty thousand, two hundred eleven".