220435121 has 4 divisors (see below), whose sum is σ = 220821744. Its totient is φ = 220048500.

The previous prime is 220435081. The next prime is 220435129. The reversal of 220435121 is 121534022.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121534022 = 2 ⋅60767011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220435121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220435093 and 220435102.

It is not an unprimeable number, because it can be changed into a prime (220435129) 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, 192455 + ... + 193596.

It is an arithmetic number, because the mean of its divisors is an integer number (55205436).

Almost surely, 2^220435121 is an apocalyptic number.

It is an amenable number.

220435121 is a deficient number, since it is larger than the sum of its proper divisors (386623).

220435121 is an equidigital number, since it uses as much as digits as its factorization.

220435121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386622.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 220435121 is about 14847.0576546331. The cubic root of 220435121 is about 604.0788029647.

Adding to 220435121 its reverse (121534022), we get a palindrome (341969143).

The spelling of 220435121 in words is "two hundred twenty million, four hundred thirty-five thousand, one hundred twenty-one".