20211211211 has 8 divisors (see below), whose sum is σ = 20987789424. Its totient is φ = 19448138880.

The previous prime is 20211211169. The next prime is 20211211213. The reversal of 20211211211 is 11211211202.

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 20211211211 - 2⁶ = 20211211147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211211213) 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, 3373421 + ... + 3379406.

It is an arithmetic number, because the mean of its divisors is an integer number (2623473678).

Almost surely, 2^20211211211 is an apocalyptic number.

20211211211 is a deficient number, since it is larger than the sum of its proper divisors (776578213).

20211211211 is an equidigital number, since it uses as much as digits as its factorization.

20211211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752941.

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

Adding to 20211211211 its reverse (11211211202), we get a palindrome (31422422413).

Subtracting from 20211211211 its reverse (11211211202), we obtain a palindrome (9000000009).

It can be divided in two parts, 202 and 11211211, that multiplied together give a palindrome (2264664622).

The spelling of 20211211211 in words is "twenty billion, two hundred eleven million, two hundred eleven thousand, two hundred eleven".