1013123111 has 32 divisors (see below), whose sum is σ = 1431897600. Its totient is φ = 690353280.

The previous prime is 1013123101. The next prime is 1013123123. The reversal of 1013123111 is 1113213101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1013123111 - 2⁶ = 1013123047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013123101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7616 + ... + 45653.

It is an arithmetic number, because the mean of its divisors is an integer number (44746800).

Almost surely, 2^1013123111 is an apocalyptic number.

1013123111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1013123111 is a deficient number, since it is larger than the sum of its proper divisors (418774489).

1013123111 is a wasteful number, since it uses less digits than its factorization.

1013123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53319.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1013123111 is about 31829.5948921754. The cubic root of 1013123111 is about 1004.3553735154.

Adding to 1013123111 its reverse (1113213101), we get a palindrome (2126336212).

The spelling of 1013123111 in words is "one billion, thirteen million, one hundred twenty-three thousand, one hundred eleven".