111443021 has 8 divisors (see below), whose sum is σ = 112988064. Its totient is φ = 109902960.

The previous prime is 111442987. The next prime is 111443023. The reversal of 111443021 is 120344111.

It is a happy number.

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 111443021 - 2⁶ = 111442957 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 (111443023) 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, 72026 + ... + 73556.

It is an arithmetic number, because the mean of its divisors is an integer number (14123508).

Almost surely, 2^111443021 is an apocalyptic number.

It is an amenable number.

111443021 is a deficient number, since it is larger than the sum of its proper divisors (1545043).

111443021 is an equidigital number, since it uses as much as digits as its factorization.

111443021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 111443021 is about 10556.6576623475. The cubic root of 111443021 is about 481.2280778005.

Adding to 111443021 its reverse (120344111), we get a palindrome (231787132).

The spelling of 111443021 in words is "one hundred eleven million, four hundred forty-three thousand, twenty-one".