11200111211221 has 2 divisors, whose sum is σ = 11200111211222. Its totient is φ = 11200111211220.

The previous prime is 11200111211213. The next prime is 11200111211243. The reversal of 11200111211221 is 12211211100211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11166992307025 + 33118904196 = 3341705^2 + 181986^2 .

It is a cyclic number.

It is not a de Polignac number, because 11200111211221 - 2³ = 11200111211213 is a prime.

It is a super-2 number, since 2×11200111211221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11200111211195 and 11200111211204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11200111211291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600055605610 + 5600055605611.

It is an arithmetic number, because the mean of its divisors is an integer number (5600055605611).

Almost surely, 2^{11200111211221} is an apocalyptic number.

It is an amenable number.

11200111211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11200111211221 is an equidigital number, since it uses as much as digits as its factorization.

11200111211221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11200111211221 its reverse (12211211100211), we get a palindrome (23411322311432).

The spelling of 11200111211221 in words is "eleven trillion, two hundred billion, one hundred eleven million, two hundred eleven thousand, two hundred twenty-one".