111231541 has 4 divisors (see below), whose sum is σ = 111483072. Its totient is φ = 110980012.

The previous prime is 111231539. The next prime is 111231551. The reversal of 111231541 is 145132111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111231541 - 2¹ = 111231539 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 (111231521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125101 + ... + 125986.

It is an arithmetic number, because the mean of its divisors is an integer number (27870768).

Almost surely, 2^111231541 is an apocalyptic number.

It is an amenable number.

111231541 is a deficient number, since it is larger than the sum of its proper divisors (251531).

111231541 is an equidigital number, since it uses as much as digits as its factorization.

111231541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251530.

The product of its digits is 120, while the sum is 19.

The square root of 111231541 is about 10546.6364780436. The cubic root of 111231541 is about 480.9234840100.

Adding to 111231541 its reverse (145132111), we get a palindrome (256363652).

The spelling of 111231541 in words is "one hundred eleven million, two hundred thirty-one thousand, five hundred forty-one".