220102123 has 4 divisors (see below), whose sum is σ = 220640680. Its totient is φ = 219563568.

The previous prime is 220102117. The next prime is 220102133. The reversal of 220102123 is 321201022.

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 220102123 - 2¹⁷ = 219971051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220102133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268665 + ... + 269482.

It is an arithmetic number, because the mean of its divisors is an integer number (55160170).

Almost surely, 2^220102123 is an apocalyptic number.

220102123 is a deficient number, since it is larger than the sum of its proper divisors (538557).

220102123 is an equidigital number, since it uses as much as digits as its factorization.

220102123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538556.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 220102123 is about 14835.8391404059. The cubic root of 220102123 is about 603.7744679003.

Adding to 220102123 its reverse (321201022), we get a palindrome (541303145).

The spelling of 220102123 in words is "two hundred twenty million, one hundred two thousand, one hundred twenty-three".