11113101221 has 2 divisors, whose sum is σ = 11113101222. Its totient is φ = 11113101220.

The previous prime is 11113101203. The next prime is 11113101239. The reversal of 11113101221 is 12210131111.

It is a balanced prime because it is at equal distance from previous prime (11113101203) and next prime (11113101239).

It can be written as a sum of positive squares in only one way, i.e., 10913980900 + 199120321 = 104470^2 + 14111^2 .

It is an emirp because it is prime and its reverse (12210131111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11113101221 - 2²² = 11108906917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11113101196 and 11113101205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11113101271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556550610 + 5556550611.

It is an arithmetic number, because the mean of its divisors is an integer number (5556550611).

Almost surely, 2^11113101221 is an apocalyptic number.

It is an amenable number.

11113101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11113101221 is an equidigital number, since it uses as much as digits as its factorization.

11113101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11113101221 its reverse (12210131111), we get a palindrome (23323232332).

The spelling of 11113101221 in words is "eleven billion, one hundred thirteen million, one hundred one thousand, two hundred twenty-one".