111540221 has 8 divisors (see below), whose sum is σ = 120207360. Its totient is φ = 102885552.

The previous prime is 111540211. The next prime is 111540251. The reversal of 111540221 is 122045111.

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 111540221 - 2⁶ = 111540157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111540221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111540211) 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, 24740 + ... + 28898.

It is an arithmetic number, because the mean of its divisors is an integer number (15025920).

Almost surely, 2^111540221 is an apocalyptic number.

It is an amenable number.

111540221 is a deficient number, since it is larger than the sum of its proper divisors (8667139).

111540221 is a wasteful number, since it uses less digits than its factorization.

111540221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6235.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 111540221 is about 10561.2603887983. The cubic root of 111540221 is about 481.3679453198.

Adding to 111540221 its reverse (122045111), we get a palindrome (233585332).

The spelling of 111540221 in words is "one hundred eleven million, five hundred forty thousand, two hundred twenty-one".