20021110211 has 8 divisors (see below), whose sum is σ = 20218867920. Its totient is φ = 19824266592.

The previous prime is 20021110177. The next prime is 20021110223. The reversal of 20021110211 is 11201112002.

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 20021110211 - 2³⁰ = 18947368387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20021110192 and 20021110201.

It is not an unprimeable number, because it can be changed into a prime (20021110111) 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, 184460 + ... + 272153.

It is an arithmetic number, because the mean of its divisors is an integer number (2527358490).

Almost surely, 2^20021110211 is an apocalyptic number.

20021110211 is a deficient number, since it is larger than the sum of its proper divisors (197757709).

20021110211 is a wasteful number, since it uses less digits than its factorization.

20021110211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457045.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20021110211 its reverse (11201112002), we get a palindrome (31222222213).

The spelling of 20021110211 in words is "twenty billion, twenty-one million, one hundred ten thousand, two hundred eleven".