220353121 has 4 divisors (see below), whose sum is σ = 220402692. Its totient is φ = 220303552.

The previous prime is 220353103. The next prime is 220353149. The reversal of 220353121 is 121353022.

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 149793121 + 70560000 = 12239^2 + 8400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220353121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220353101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17380 + ... + 27253.

It is an arithmetic number, because the mean of its divisors is an integer number (55100673).

Almost surely, 2^220353121 is an apocalyptic number.

It is an amenable number.

220353121 is a deficient number, since it is larger than the sum of its proper divisors (49571).

220353121 is an equidigital number, since it uses as much as digits as its factorization.

220353121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49570.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 220353121 is about 14844.2959078563. The cubic root of 220353121 is about 604.0038896070.

Subtracting from 220353121 its reverse (121353022), we obtain a palindrome (99000099).

The spelling of 220353121 in words is "two hundred twenty million, three hundred fifty-three thousand, one hundred twenty-one".