1103316521 has 4 divisors (see below), whose sum is σ = 1103538000. Its totient is φ = 1103095044.

The previous prime is 1103316517. The next prime is 1103316523. The reversal of 1103316521 is 1256133011.

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 1103316521 - 2² = 1103316517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1103316523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103091 + ... + 113288.

It is an arithmetic number, because the mean of its divisors is an integer number (275884500).

Almost surely, 2^1103316521 is an apocalyptic number.

It is an amenable number.

1103316521 is a deficient number, since it is larger than the sum of its proper divisors (221479).

1103316521 is an equidigital number, since it uses as much as digits as its factorization.

1103316521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221478.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1103316521 is about 33216.2087090023. The cubic root of 1103316521 is about 1033.3165226425.

Adding to 1103316521 its reverse (1256133011), we get a palindrome (2359449532).

The spelling of 1103316521 in words is "one billion, one hundred three million, three hundred sixteen thousand, five hundred twenty-one".