111430221 has 24 divisors (see below), whose sum is σ = 173154240. Its totient is φ = 62439936.

The previous prime is 111430219. The next prime is 111430237. The reversal of 111430221 is 122034111.

It is not a de Polignac number, because 111430221 - 2¹ = 111430219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111430221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111430261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58045 + ... + 59933.

It is an arithmetic number, because the mean of its divisors is an integer number (7214760).

Almost surely, 2^111430221 is an apocalyptic number.

It is an amenable number.

111430221 is a deficient number, since it is larger than the sum of its proper divisors (61724019).

111430221 is an equidigital number, since it uses as much as digits as its factorization.

111430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005 (or 1952 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 111430221 is about 10556.0513924478. The cubic root of 111430221 is about 481.2096529732.

Adding to 111430221 its reverse (122034111), we get a palindrome (233464332).

The spelling of 111430221 in words is "one hundred eleven million, four hundred thirty thousand, two hundred twenty-one".