1100123 has 2 divisors, whose sum is σ = 1100124. Its totient is φ = 1100122.

The previous prime is 1100101. The next prime is 1100131. The reversal of 1100123 is 3210011.

It is an a-pointer prime, because the next prime (1100131) can be obtained adding 1100123 to its sum of digits (8).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1100123 - 2⁸ = 1099867 is a prime.

1100123 is a modest number, since divided by 123 gives 11 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1100123.

It is not a weakly prime, because it can be changed into another prime (1100023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550061 + 550062.

It is an arithmetic number, because the mean of its divisors is an integer number (550062).

2^1100123 is an apocalyptic number.

1100123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100123 is an equidigital number, since it uses as much as digits as its factorization.

1100123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1100123 is about 1048.8674844803. The cubic root of 1100123 is about 103.2318589918.

Adding to 1100123 its reverse (3210011), we get a palindrome (4310134).

The spelling of 1100123 in words is "one million, one hundred thousand, one hundred twenty-three".