1113215521 has 4 divisors (see below), whose sum is σ = 1214416944. Its totient is φ = 1012014100.

The previous prime is 1113215507. The next prime is 1113215531. The reversal of 1113215521 is 1255123111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1113215521 - 2¹⁷ = 1113084449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1113215492 and 1113215501.

It is not an unprimeable number, because it can be changed into a prime (1113215531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50600695 + ... + 50600716.

It is an arithmetic number, because the mean of its divisors is an integer number (303604236).

Almost surely, 2^1113215521 is an apocalyptic number.

1113215521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1113215521 is a deficient number, since it is larger than the sum of its proper divisors (101201423).

1113215521 is a wasteful number, since it uses less digits than its factorization.

1113215521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101201422.

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

The square root of 1113215521 is about 33364.8845494781. The cubic root of 1113215521 is about 1036.3976453512.

Adding to 1113215521 its reverse (1255123111), we get a palindrome (2368338632).

The spelling of 1113215521 in words is "one billion, one hundred thirteen million, two hundred fifteen thousand, five hundred twenty-one".