1123122013 has 16 divisors (see below), whose sum is σ = 1244401200. Its totient is φ = 1006926336.

The previous prime is 1123122001. The next prime is 1123122037. The reversal of 1123122013 is 3102213211.

It can be written as a sum of positive squares in 8 ways, for example, as 1006009 + 1122116004 = 1003^2 + 33498^2 .

It is not a de Polignac number, because 1123122013 - 2⁵ = 1123121981 is a prime.

It is a super-2 number, since 2×1123122013² = 2522806112170344338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123122073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323913 + ... + 327361.

It is an arithmetic number, because the mean of its divisors is an integer number (77775075).

Almost surely, 2^1123122013 is an apocalyptic number.

1123122013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1123122013 is a deficient number, since it is larger than the sum of its proper divisors (121279187).

1123122013 is a wasteful number, since it uses less digits than its factorization.

1123122013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1123122013 is about 33513.0125921261. The cubic root of 1123122013 is about 1039.4628676652.

Adding to 1123122013 its reverse (3102213211), we get a palindrome (4225335224).

The spelling of 1123122013 in words is "one billion, one hundred twenty-three million, one hundred twenty-two thousand, thirteen".