22112011122221 has 2 divisors, whose sum is σ = 22112011122222. Its totient is φ = 22112011122220.

The previous prime is 22112011122167. The next prime is 22112011122247. The reversal of 22112011122221 is 12222111021122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20958642519721 + 1153368602500 = 4578061^2 + 1073950^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112011122221 - 2¹⁴ = 22112011105837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22112011122193 and 22112011122202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22112011127221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11056005561110 + 11056005561111.

It is an arithmetic number, because the mean of its divisors is an integer number (11056005561111).

Almost surely, 2^{22112011122221} is an apocalyptic number.

It is an amenable number.

22112011122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22112011122221 is an equidigital number, since it uses as much as digits as its factorization.

22112011122221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22112011122221 its reverse (12222111021122), we get a palindrome (34334122143343).

The spelling of 22112011122221 in words is "twenty-two trillion, one hundred twelve billion, eleven million, one hundred twenty-two thousand, two hundred twenty-one".