11100100212221 has 2 divisors, whose sum is σ = 11100100212222. Its totient is φ = 11100100212220.

The previous prime is 11100100212193. The next prime is 11100100212241. The reversal of 11100100212221 is 12221200100111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10006530156100 + 1093570056121 = 3163310^2 + 1045739^2 .

It is an emirp because it is prime and its reverse (12221200100111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11100100212221 - 2²² = 11100096017917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11100100212196 and 11100100212205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11100100212241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550050106110 + 5550050106111.

It is an arithmetic number, because the mean of its divisors is an integer number (5550050106111).

Almost surely, 2^{11100100212221} is an apocalyptic number.

It is an amenable number.

11100100212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100100212221 is an equidigital number, since it uses as much as digits as its factorization.

11100100212221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11100100212221 its reverse (12221200100111), we get a palindrome (23321300312332).

The spelling of 11100100212221 in words is "eleven trillion, one hundred billion, one hundred million, two hundred twelve thousand, two hundred twenty-one".