11113487221 has 2 divisors, whose sum is σ = 11113487222. Its totient is φ = 11113487220.

The previous prime is 11113487149. The next prime is 11113487233. The reversal of 11113487221 is 12278431111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9003922321 + 2109564900 = 94889^2 + 45930^2 .

It is a cyclic number.

It is not a de Polignac number, because 11113487221 - 2¹³ = 11113479029 is a prime.

It is a super-2 number, since 2×11113487221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11113487621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556743610 + 5556743611.

It is an arithmetic number, because the mean of its divisors is an integer number (5556743611).

Almost surely, 2^11113487221 is an apocalyptic number.

It is an amenable number.

11113487221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11113487221 is an equidigital number, since it uses as much as digits as its factorization.

11113487221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 31.

The spelling of 11113487221 in words is "eleven billion, one hundred thirteen million, four hundred eighty-seven thousand, two hundred twenty-one".