221303030123 has 8 divisors (see below), whose sum is σ = 258298977792. Its totient is φ = 185652389736.

The previous prime is 221303030093. The next prime is 221303030153. The reversal of 221303030123 is 321030303122.

It is an interprime number because it is at equal distance from previous prime (221303030093) and next prime (221303030153).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221303030123 - 2¹² = 221303026027 is a prime.

It is a super-2 number, since 2×221303030123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221303030095 and 221303030104.

It is not an unprimeable number, because it can be changed into a prime (221303030153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336326465 + ... + 336327122.

It is an arithmetic number, because the mean of its divisors is an integer number (32287372224).

Almost surely, 2^221303030123 is an apocalyptic number.

221303030123 is a deficient number, since it is larger than the sum of its proper divisors (36995947669).

221303030123 is an equidigital number, since it uses as much as digits as its factorization.

221303030123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672653641.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 221303030123 its reverse (321030303122), we get a palindrome (542333333245).

The spelling of 221303030123 in words is "two hundred twenty-one billion, three hundred three million, thirty thousand, one hundred twenty-three".