1111521113 has 2 divisors, whose sum is σ = 1111521114. Its totient is φ = 1111521112.

The previous prime is 1111521097. The next prime is 1111521137. The reversal of 1111521113 is 3111251111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1004129344 + 107391769 = 31688^2 + 10363^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111521113 - 2⁴ = 1111521097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111521091 and 1111521100.

It is not a weakly prime, because it can be changed into another prime (1111521913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555760556 + 555760557.

It is an arithmetic number, because the mean of its divisors is an integer number (555760557).

Almost surely, 2^1111521113 is an apocalyptic number.

It is an amenable number.

1111521113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111521113 is an equidigital number, since it uses as much as digits as its factorization.

1111521113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30, while the sum is 17.

The square root of 1111521113 is about 33339.4827944286. The cubic root of 1111521113 is about 1035.8715501042.

Adding to 1111521113 its reverse (3111251111), we get a palindrome (4222772224).

The spelling of 1111521113 in words is "one billion, one hundred eleven million, five hundred twenty-one thousand, one hundred thirteen".