111214521 has 12 divisors (see below), whose sum is σ = 175247280. Its totient is φ = 67402680.

The previous prime is 111214501. The next prime is 111214531. The reversal of 111214521 is 125412111.

It is not a de Polignac number, because 111214521 - 2⁷ = 111214393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111214494 and 111214503.

It is not an unprimeable number, because it can be changed into a prime (111214501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 561591 + ... + 561788.

It is an arithmetic number, because the mean of its divisors is an integer number (14603940).

Almost surely, 2^111214521 is an apocalyptic number.

111214521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111214521 is a deficient number, since it is larger than the sum of its proper divisors (64032759).

111214521 is a wasteful number, since it uses less digits than its factorization.

111214521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123396 (or 1123393 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 111214521 is about 10545.8295548525. The cubic root of 111214521 is about 480.8989533923.

Adding to 111214521 its reverse (125412111), we get a palindrome (236626632).

The spelling of 111214521 in words is "one hundred eleven million, two hundred fourteen thousand, five hundred twenty-one".