1123113031 has 4 divisors (see below), whose sum is σ = 1134233064. Its totient is φ = 1111993000.

The previous prime is 1123113011. The next prime is 1123113037. The reversal of 1123113031 is 1303113211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1123113031 - 2¹⁹ = 1122588743 is a prime.

It is a super-2 number, since 2×1123113031² = 2522765760804013922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123112996 and 1123113014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123113037) 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, 5559865 + ... + 5560066.

It is an arithmetic number, because the mean of its divisors is an integer number (283558266).

Almost surely, 2^1123113031 is an apocalyptic number.

1123113031 is a deficient number, since it is larger than the sum of its proper divisors (11120033).

1123113031 is a wasteful number, since it uses less digits than its factorization.

1123113031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120032.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1123113031 is about 33512.8785842100. The cubic root of 1123113031 is about 1039.4600966750.

Adding to 1123113031 its reverse (1303113211), we get a palindrome (2426226242).

The spelling of 1123113031 in words is "one billion, one hundred twenty-three million, one hundred thirteen thousand, thirty-one".