221422123 has 8 divisors (see below), whose sum is σ = 243528768. Its totient is φ = 200040384.

The previous prime is 221422111. The next prime is 221422129. The reversal of 221422123 is 321224122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221422123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221422123.

It is not an unprimeable number, because it can be changed into a prime (221422129) 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 7 ways as a sum of consecutive naturals, for example, 180586 + ... + 181807.

It is an arithmetic number, because the mean of its divisors is an integer number (30441096).

Almost surely, 2^221422123 is an apocalyptic number.

221422123 is a deficient number, since it is larger than the sum of its proper divisors (22106645).

221422123 is a wasteful number, since it uses less digits than its factorization.

221422123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362453.

The product of its digits is 384, while the sum is 19.

The square root of 221422123 is about 14880.2595071457. The cubic root of 221422123 is about 604.9790517073.

Adding to 221422123 its reverse (321224122), we get a palindrome (542646245).

The spelling of 221422123 in words is "two hundred twenty-one million, four hundred twenty-two thousand, one hundred twenty-three".