220220123 has 4 divisors (see below), whose sum is σ = 220295400. Its totient is φ = 220144848.

The previous prime is 220220111. The next prime is 220220137. The reversal of 220220123 is 321022022.

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

It is a cyclic number.

It is not a de Polignac number, because 220220123 - 2⁴ = 220220107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220220098 and 220220107.

It is not an unprimeable number, because it can be changed into a prime (220220153) 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, 33065 + ... + 39162.

It is an arithmetic number, because the mean of its divisors is an integer number (55073850).

Almost surely, 2^220220123 is an apocalyptic number.

220220123 is a deficient number, since it is larger than the sum of its proper divisors (75277).

220220123 is an equidigital number, since it uses as much as digits as its factorization.

220220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75276.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 220220123 is about 14839.8154638122. The cubic root of 220220123 is about 603.8823460951.

Adding to 220220123 its reverse (321022022), we get a palindrome (541242145).

The spelling of 220220123 in words is "two hundred twenty million, two hundred twenty thousand, one hundred twenty-three".