1103512321 has 4 divisors (see below), whose sum is σ = 1141564500. Its totient is φ = 1065460144.

The previous prime is 1103512303. The next prime is 1103512351. The reversal of 1103512321 is 1232153011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1232153011 = 83 ⋅14845217.

It can be written as a sum of positive squares in 2 ways, for example, as 238270096 + 865242225 = 15436^2 + 29415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1103512321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1103512351) 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, 19026046 + ... + 19026103.

It is an arithmetic number, because the mean of its divisors is an integer number (285391125).

Almost surely, 2^1103512321 is an apocalyptic number.

It is an amenable number.

1103512321 is a deficient number, since it is larger than the sum of its proper divisors (38052179).

1103512321 is an equidigital number, since it uses as much as digits as its factorization.

1103512321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38052178.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1103512321 is about 33219.1559344906. The cubic root of 1103512321 is about 1033.3776448451.

Adding to 1103512321 its reverse (1232153011), we get a palindrome (2335665332).

The spelling of 1103512321 in words is "one billion, one hundred three million, five hundred twelve thousand, three hundred twenty-one".