111440621 has 2 divisors, whose sum is σ = 111440622. Its totient is φ = 111440620.

The previous prime is 111440611. The next prime is 111440657. The reversal of 111440621 is 126044111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88266025 + 23174596 = 9395^2 + 4814^2 .

It is an emirp because it is prime and its reverse (126044111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111440621 - 2²⁶ = 44331757 is a prime.

It is a super-3 number, since 3×111440621³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 111440593 and 111440602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111440611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55720310 + 55720311.

It is an arithmetic number, because the mean of its divisors is an integer number (55720311).

Almost surely, 2^111440621 is an apocalyptic number.

It is an amenable number.

111440621 is a deficient number, since it is larger than the sum of its proper divisors (1).

111440621 is an equidigital number, since it uses as much as digits as its factorization.

111440621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 111440621 is about 10556.5439893935. The cubic root of 111440621 is about 481.2246232529.

Adding to 111440621 its reverse (126044111), we get a palindrome (237484732).

The spelling of 111440621 in words is "one hundred eleven million, four hundred forty thousand, six hundred twenty-one".