111412521 has 12 divisors (see below), whose sum is σ = 175559280. Its totient is φ = 67522680.

The previous prime is 111412471. The next prime is 111412549. The reversal of 111412521 is 125214111.

111412521 is a `hidden beast` number, since 1 + 1 + 141 + 2 + 521 = 666.

It is not a de Polignac number, because 111412521 - 2¹⁴ = 111396137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111412494 and 111412503.

It is not an unprimeable number, because it can be changed into a prime (111412121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 562591 + ... + 562788.

It is an arithmetic number, because the mean of its divisors is an integer number (14629940).

Almost surely, 2^111412521 is an apocalyptic number.

111412521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111412521 is a deficient number, since it is larger than the sum of its proper divisors (64146759).

111412521 is a wasteful number, since it uses less digits than its factorization.

111412521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125396 (or 1125393 counting only the distinct ones).

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

The square root of 111412521 is about 10555.2129774818. The cubic root of 111412521 is about 481.1841725671.

Adding to 111412521 its reverse (125214111), we get a palindrome (236626632).

The spelling of 111412521 in words is "one hundred eleven million, four hundred twelve thousand, five hundred twenty-one".