21222021120211 has 16 divisors (see below), whose sum is σ = 21432295987200. Its totient is φ = 21012994450080.

The previous prime is 21222021120193. The next prime is 21222021120221. The reversal of 21222021120211 is 11202112022212.

It is a cyclic number.

It is not a de Polignac number, because 21222021120211 - 2¹⁷ = 21222020989139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222021120221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37246276 + ... + 37811758.

It is an arithmetic number, because the mean of its divisors is an integer number (1339518499200).

Almost surely, 2^{21222021120211} is an apocalyptic number.

21222021120211 is a deficient number, since it is larger than the sum of its proper divisors (210274866989).

21222021120211 is a wasteful number, since it uses less digits than its factorization.

21222021120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566586.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21222021120211 its reverse (11202112022212), we get a palindrome (32424133142423).

The spelling of 21222021120211 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, one hundred twenty thousand, two hundred eleven".