22200112112221 has 2 divisors, whose sum is σ = 22200112112222. Its totient is φ = 22200112112220.

The previous prime is 22200112112179. The next prime is 22200112112261. The reversal of 22200112112221 is 12221121100222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13879454564196 + 8320657548025 = 3725514^2 + 2884555^2 .

It is a cyclic number.

It is not a de Polignac number, because 22200112112221 - 2¹⁷ = 22200111981149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22200112112261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100056056110 + 11100056056111.

It is an arithmetic number, because the mean of its divisors is an integer number (11100056056111).

Almost surely, 2^{22200112112221} is an apocalyptic number.

It is an amenable number.

22200112112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22200112112221 is an equidigital number, since it uses as much as digits as its factorization.

22200112112221 is an evil number, because the sum of its binary digits is even.

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

Adding to 22200112112221 its reverse (12221121100222), we get a palindrome (34421233212443).

The spelling of 22200112112221 in words is "twenty-two trillion, two hundred billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty-one".