11872111 has 2 divisors, whose sum is σ = 11872112. Its totient is φ = 11872110.

The previous prime is 11872099. The next prime is 11872177. The reversal of 11872111 is 11127811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11872111 - 2⁷ = 11871983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11872181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5936055 + 5936056.

It is an arithmetic number, because the mean of its divisors is an integer number (5936056).

Almost surely, 2^11872111 is an apocalyptic number.

11872111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11872111 is an equidigital number, since it uses as much as digits as its factorization.

11872111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112, while the sum is 22.

The square root of 11872111 is about 3445.5929823472. The cubic root of 11872111 is about 228.1266288994.

Adding to 11872111 its reverse (11127811), we get a palindrome (22999922).

The spelling of 11872111 in words is "eleven million, eight hundred seventy-two thousand, one hundred eleven".