222001123 has 4 divisors (see below), whose sum is σ = 222701760. Its totient is φ = 221300488.

The previous prime is 222001121. The next prime is 222001141. The reversal of 222001123 is 321100222.

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 222001123 - 2¹ = 222001121 is a prime.

It is a super-2 number, since 2×222001123² = 98568997226522258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222001121) 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, 349843 + ... + 350476.

It is an arithmetic number, because the mean of its divisors is an integer number (55675440).

Almost surely, 2^222001123 is an apocalyptic number.

222001123 is a deficient number, since it is larger than the sum of its proper divisors (700637).

222001123 is an equidigital number, since it uses as much as digits as its factorization.

222001123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700636.

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

The square root of 222001123 is about 14899.7021111162. The cubic root of 222001123 is about 605.5059156434.

Adding to 222001123 its reverse (321100222), we get a palindrome (543101345).

Subtracting 222001123 from its reverse (321100222), we obtain a palindrome (99099099).

The spelling of 222001123 in words is "two hundred twenty-two million, one thousand, one hundred twenty-three".