1113232521 has 16 divisors (see below), whose sum is σ = 1502815104. Its totient is φ = 732960384.

The previous prime is 1113232507. The next prime is 1113232567. The reversal of 1113232521 is 1252323111.

It is not a de Polignac number, because 1113232521 - 2⁵ = 1113232489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1113232621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71581 + ... + 85733.

It is an arithmetic number, because the mean of its divisors is an integer number (93925944).

Almost surely, 2^1113232521 is an apocalyptic number.

It is an amenable number.

1113232521 is a deficient number, since it is larger than the sum of its proper divisors (389582583).

1113232521 is a wasteful number, since it uses less digits than its factorization.

1113232521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14480.

The product of its digits is 360, while the sum is 21.

The square root of 1113232521 is about 33365.1393073669. The cubic root of 1113232521 is about 1036.4029209604.

Adding to 1113232521 its reverse (1252323111), we get a palindrome (2365555632).

The spelling of 1113232521 in words is "one billion, one hundred thirteen million, two hundred thirty-two thousand, five hundred twenty-one".