11670111 has 6 divisors (see below), whose sum is σ = 16856840. Its totient is φ = 7780068.

The previous prime is 11670107. The next prime is 11670119. The reversal of 11670111 is 11107611.

11670111 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11670111 - 2² = 11670107 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11670119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 648331 + ... + 648348.

Almost surely, 2^11670111 is an apocalyptic number.

11670111 is a deficient number, since it is larger than the sum of its proper divisors (5186729).

11670111 is a wasteful number, since it uses less digits than its factorization.

11670111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296685 (or 1296682 counting only the distinct ones).

The product of its (nonzero) digits is 42, while the sum is 18.

The square root of 11670111 is about 3416.1544168846. The cubic root of 11670111 is about 226.8253879178.

Adding to 11670111 its reverse (11107611), we get a palindrome (22777722).

Subtracting from 11670111 its reverse (11107611), we obtain a square (562500 = 750²).

It can be divided in two parts, 11670 and 111, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 11670111 in words is "eleven million, six hundred seventy thousand, one hundred eleven".