1100320123 has 4 divisors (see below), whose sum is σ = 1257508720. Its totient is φ = 943131528.

The previous prime is 1100320099. The next prime is 1100320129. The reversal of 1100320123 is 3210230011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3210230011 = 251 ⋅12789761.

It is a cyclic number.

It is not a de Polignac number, because 1100320123 - 2¹³ = 1100311931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1100320129) 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, 78594288 + ... + 78594301.

It is an arithmetic number, because the mean of its divisors is an integer number (314377180).

Almost surely, 2^1100320123 is an apocalyptic number.

1100320123 is a deficient number, since it is larger than the sum of its proper divisors (157188597).

1100320123 is an equidigital number, since it uses as much as digits as its factorization.

1100320123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157188596.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1100320123 is about 33171.0735882938. The cubic root of 1100320123 is about 1032.3802441097.

Adding to 1100320123 its reverse (3210230011), we get a palindrome (4310550134).

The spelling of 1100320123 in words is "one billion, one hundred million, three hundred twenty thousand, one hundred twenty-three".