1121000123 has 4 divisors (see below), whose sum is σ = 1133595720. Its totient is φ = 1108404528.

The previous prime is 1121000119. The next prime is 1121000131. The reversal of 1121000123 is 3210001211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3210001211 = 26227 ⋅122393.

It is a cyclic number.

It is not a de Polignac number, because 1121000123 - 2² = 1121000119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121000623) 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, 6297665 + ... + 6297842.

It is an arithmetic number, because the mean of its divisors is an integer number (283398930).

Almost surely, 2^1121000123 is an apocalyptic number.

1121000123 is a deficient number, since it is larger than the sum of its proper divisors (12595597).

1121000123 is an equidigital number, since it uses as much as digits as its factorization.

1121000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12595596.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1121000123 is about 33481.3399224105. The cubic root of 1121000123 is about 1038.8078434523.

Adding to 1121000123 its reverse (3210001211), we get a palindrome (4331001334).

The spelling of 1121000123 in words is "one billion, one hundred twenty-one million, one hundred twenty-three", and thus it is an aban number.