21220022112211 has 16 divisors (see below), whose sum is σ = 22988101746400. Its totient is φ = 19587244626144.

The previous prime is 21220022112193. The next prime is 21220022112269. The reversal of 21220022112211 is 11221122002212.

It is not a de Polignac number, because 21220022112211 - 2¹⁷ = 21220021981139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220022115211) 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, 120542725 + ... + 120718633.

It is an arithmetic number, because the mean of its divisors is an integer number (1436756359150).

Almost surely, 2^{21220022112211} is an apocalyptic number.

21220022112211 is a deficient number, since it is larger than the sum of its proper divisors (1768079634189).

21220022112211 is an equidigital number, since it uses as much as digits as its factorization.

21220022112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230855 (or 230829 counting only the distinct ones).

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

Adding to 21220022112211 its reverse (11221122002212), we get a palindrome (32441144114423).

The spelling of 21220022112211 in words is "twenty-one trillion, two hundred twenty billion, twenty-two million, one hundred twelve thousand, two hundred eleven".