1123401111 has 16 divisors (see below), whose sum is σ = 1724921088. Its totient is φ = 637041600.

The previous prime is 1123401077. The next prime is 1123401131. The reversal of 1123401111 is 1111043211.

It is not a de Polignac number, because 1123401111 - 2⁶ = 1123401047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123401131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201430 + ... + 206931.

It is an arithmetic number, because the mean of its divisors is an integer number (107807568).

Almost surely, 2^1123401111 is an apocalyptic number.

1123401111 is a deficient number, since it is larger than the sum of its proper divisors (601519977).

1123401111 is a wasteful number, since it uses less digits than its factorization.

1123401111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408502.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 1123401111 is about 33517.1763578020. The cubic root of 1123401111 is about 1039.5489633807.

Adding to 1123401111 its reverse (1111043211), we get a palindrome (2234444322).

The spelling of 1123401111 in words is "one billion, one hundred twenty-three million, four hundred one thousand, one hundred eleven".