220340123 has 2 divisors, whose sum is σ = 220340124. Its totient is φ = 220340122.

The previous prime is 220340119. The next prime is 220340147. The reversal of 220340123 is 321043022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220340123 - 2² = 220340119 is a prime.

It is not a weakly prime, because it can be changed into another prime (220342123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110170061 + 110170062.

It is an arithmetic number, because the mean of its divisors is an integer number (110170062).

Almost surely, 2^220340123 is an apocalyptic number.

220340123 is a deficient number, since it is larger than the sum of its proper divisors (1).

220340123 is an equidigital number, since it uses as much as digits as its factorization.

220340123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 220340123 is about 14843.8580901328. The cubic root of 220340123 is about 603.9920132198.

Adding to 220340123 its reverse (321043022), we get a palindrome (541383145).

The spelling of 220340123 in words is "two hundred twenty million, three hundred forty thousand, one hundred twenty-three".