111421111 has 8 divisors (see below), whose sum is σ = 124184880. Its totient is φ = 99347328.

The previous prime is 111421091. The next prime is 111421139. The reversal of 111421111 is 111124111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111421111 - 2²¹ = 109323959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111421091 and 111421100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111421151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172156 + ... + 172801.

It is an arithmetic number, because the mean of its divisors is an integer number (15523110).

Almost surely, 2^111421111 is an apocalyptic number.

111421111 is a deficient number, since it is larger than the sum of its proper divisors (12763769).

111421111 is a wasteful number, since it uses less digits than its factorization.

111421111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344993.

The product of its digits is 8, while the sum is 13.

The square root of 111421111 is about 10555.6198775818. The cubic root of 111421111 is about 481.1965388187.

Adding to 111421111 its reverse (111124111), we get a palindrome (222545222).

The spelling of 111421111 in words is "one hundred eleven million, four hundred twenty-one thousand, one hundred eleven".