1121513521 has 2 divisors, whose sum is σ = 1121513522. Its totient is φ = 1121513520.

The previous prime is 1121513507. The next prime is 1121513539. The reversal of 1121513521 is 1253151211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1121513121 + 400 = 33489^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121513521 - 2¹⁵ = 1121480753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121513492 and 1121513501.

It is not a weakly prime, because it can be changed into another prime (1121513621) 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, 560756760 + 560756761.

It is an arithmetic number, because the mean of its divisors is an integer number (560756761).

Almost surely, 2^1121513521 is an apocalyptic number.

It is an amenable number.

1121513521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121513521 is an equidigital number, since it uses as much as digits as its factorization.

1121513521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300, while the sum is 22.

The square root of 1121513521 is about 33489.0059721097. The cubic root of 1121513521 is about 1038.9664043843.

Adding to 1121513521 its reverse (1253151211), we get a palindrome (2374664732).

The spelling of 1121513521 in words is "one billion, one hundred twenty-one million, five hundred thirteen thousand, five hundred twenty-one".