111141111 has 8 divisors (see below), whose sum is σ = 151634560. Its totient is φ = 72370872.

The previous prime is 111141109. The next prime is 111141139.

111141111 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 111141111 - 2¹ = 111141109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111141011) 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, 430651 + ... + 430908.

It is an arithmetic number, because the mean of its divisors is an integer number (18954320).

Almost surely, 2^111141111 is an apocalyptic number.

111141111 is a deficient number, since it is larger than the sum of its proper divisors (40493449).

111141111 is an equidigital number, since it uses as much as digits as its factorization.

111141111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861605.

The product of its digits is 4, while the sum is 12.

The square root of 111141111 is about 10542.3484575307. The cubic root of 111141111 is about 480.7931202025.

The spelling of 111141111 in words is "one hundred eleven million, one hundred forty-one thousand, one hundred eleven".