111401021 has 4 divisors (see below), whose sum is σ = 111448032. Its totient is φ = 111354012.

The previous prime is 111400999. The next prime is 111401039. The reversal of 111401021 is 120104111.

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 111401021 - 2⁶ = 111400957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111400993 and 111401011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111401621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19751 + ... + 24756.

It is an arithmetic number, because the mean of its divisors is an integer number (27862008).

Almost surely, 2^111401021 is an apocalyptic number.

It is an amenable number.

111401021 is a deficient number, since it is larger than the sum of its proper divisors (47011).

111401021 is an equidigital number, since it uses as much as digits as its factorization.

111401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47010.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 111401021 is about 10554.6682089017. The cubic root of 111401021 is about 481.1676160546.

Adding to 111401021 its reverse (120104111), we get a palindrome (231505132).

The spelling of 111401021 in words is "one hundred eleven million, four hundred one thousand, twenty-one".