21222002220211 has 16 divisors (see below), whose sum is σ = 23747941224448. Its totient is φ = 18832072644000.

The previous prime is 21222002220193. The next prime is 21222002220233. The reversal of 21222002220211 is 11202220022212.

It is a cyclic number.

It is not a de Polignac number, because 21222002220211 - 2²⁷ = 21221868002483 is a prime.

It is a super-2 number, since 2×21222002220211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222002220241) 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, 174310191 + ... + 174431896.

It is an arithmetic number, because the mean of its divisors is an integer number (1484246326528).

Almost surely, 2^{21222002220211} is an apocalyptic number.

21222002220211 is a deficient number, since it is larger than the sum of its proper divisors (2525939004237).

21222002220211 is a wasteful number, since it uses less digits than its factorization.

21222002220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348742282.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21222002220211 its reverse (11202220022212), we get a palindrome (32424222242423).

The spelling of 21222002220211 in words is "twenty-one trillion, two hundred twenty-two billion, two million, two hundred twenty thousand, two hundred eleven".