2221112123 has 2 divisors, whose sum is σ = 2221112124. Its totient is φ = 2221112122.

The previous prime is 2221112119. The next prime is 2221112189. The reversal of 2221112123 is 3212111222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221112123 - 2² = 2221112119 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221112423) 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 as a sum of consecutive naturals, namely, 1110556061 + 1110556062.

It is an arithmetic number, because the mean of its divisors is an integer number (1110556062).

Almost surely, 2^2221112123 is an apocalyptic number.

2221112123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221112123 is an equidigital number, since it uses as much as digits as its factorization.

2221112123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 17.

The square root of 2221112123 is about 47128.6762279613. The cubic root of 2221112123 is about 1304.7385496206.

Adding to 2221112123 its reverse (3212111222), we get a palindrome (5433223345).

Subtracting 2221112123 from its reverse (3212111222), we obtain a palindrome (990999099).

The spelling of 2221112123 in words is "two billion, two hundred twenty-one million, one hundred twelve thousand, one hundred twenty-three".