11123971 has 4 divisors (see below), whose sum is σ = 11382712. Its totient is φ = 10865232.

The previous prime is 11123963. The next prime is 11124053. The reversal of 11123971 is 17932111.

11123971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17932111 = 23 ⋅779657.

It is a cyclic number.

It is not a de Polignac number, because 11123971 - 2³ = 11123963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11123071) 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, 129306 + ... + 129391.

It is an arithmetic number, because the mean of its divisors is an integer number (2845678).

Almost surely, 2^11123971 is an apocalyptic number.

11123971 is a deficient number, since it is larger than the sum of its proper divisors (258741).

11123971 is an equidigital number, since it uses as much as digits as its factorization.

11123971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258740.

The product of its digits is 378, while the sum is 25.

The square root of 11123971 is about 3335.2617588429. The cubic root of 11123971 is about 223.2303718364.

The spelling of 11123971 in words is "eleven million, one hundred twenty-three thousand, nine hundred seventy-one".