111220453 has 4 divisors (see below), whose sum is σ = 111698028. Its totient is φ = 110742880.

The previous prime is 111220429. The next prime is 111220457. The reversal of 111220453 is 354022111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41447844 + 69772609 = 6438^2 + 8353^2 .

It is a cyclic number.

It is not a de Polignac number, because 111220453 - 2¹³ = 111212261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111220453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111220457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238438 + ... + 238903.

It is an arithmetic number, because the mean of its divisors is an integer number (27924507).

Almost surely, 2^111220453 is an apocalyptic number.

It is an amenable number.

111220453 is a deficient number, since it is larger than the sum of its proper divisors (477575).

111220453 is an equidigital number, since it uses as much as digits as its factorization.

111220453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477574.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 111220453 is about 10546.1107997214. The cubic root of 111220453 is about 480.9075033606.

Adding to 111220453 its reverse (354022111), we get a palindrome (465242564).

The spelling of 111220453 in words is "one hundred eleven million, two hundred twenty thousand, four hundred fifty-three".