2221222123 has 4 divisors (see below), whose sum is σ = 2254374760. Its totient is φ = 2188069488.

The previous prime is 2221222121. The next prime is 2221222127. The reversal of 2221222123 is 3212221222.

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 2221222123 - 2¹ = 2221222121 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 2221222123.

It is not an unprimeable number, because it can be changed into a prime (2221222121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16576218 + ... + 16576351.

It is an arithmetic number, because the mean of its divisors is an integer number (563593690).

Almost surely, 2^2221222123 is an apocalyptic number.

2221222123 is a deficient number, since it is larger than the sum of its proper divisors (33152637).

2221222123 is an equidigital number, since it uses as much as digits as its factorization.

2221222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33152636.

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

The square root of 2221222123 is about 47129.8432312266. The cubic root of 2221222123 is about 1304.7600882108.

Adding to 2221222123 its reverse (3212221222), we get a palindrome (5433443345).

Subtracting 2221222123 from its reverse (3212221222), we obtain a palindrome (990999099).

The spelling of 2221222123 in words is "two billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-three".