11123002031 has 4 divisors (see below), whose sum is σ = 11142972072. Its totient is φ = 11103031992.

The previous prime is 11123002019. The next prime is 11123002057. The reversal of 11123002031 is 13020032111.

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 11123002031 - 2¹⁰ = 11123001007 is a prime.

It is a super-2 number, since 2×11123002031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11123001997 and 11123002015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123002931) 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, 9984185 + ... + 9985298.

It is an arithmetic number, because the mean of its divisors is an integer number (2785743018).

Almost surely, 2^11123002031 is an apocalyptic number.

11123002031 is a deficient number, since it is larger than the sum of its proper divisors (19970041).

11123002031 is an equidigital number, since it uses as much as digits as its factorization.

11123002031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19970040.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 11123002031 its reverse (13020032111), we get a palindrome (24143034142).

The spelling of 11123002031 in words is "eleven billion, one hundred twenty-three million, two thousand, thirty-one".