11123031111 has 8 divisors (see below), whose sum is σ = 14841452784. Its totient is φ = 7409981760.

The previous prime is 11123031107. The next prime is 11123031209. The reversal of 11123031111 is 11113032111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11123031111 - 2² = 11123031107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123031011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1338246 + ... + 1346531.

It is an arithmetic number, because the mean of its divisors is an integer number (1855181598).

Almost surely, 2^11123031111 is an apocalyptic number.

11123031111 is a deficient number, since it is larger than the sum of its proper divisors (3718421673).

11123031111 is a wasteful number, since it uses less digits than its factorization.

11123031111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686161.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 11123031111 its reverse (11113032111), we get a palindrome (22236063222).

The spelling of 11123031111 in words is "eleven billion, one hundred twenty-three million, thirty-one thousand, one hundred eleven".