2121224123 has 2 divisors, whose sum is σ = 2121224124. Its totient is φ = 2121224122.

The previous prime is 2121224117. The next prime is 2121224129. The reversal of 2121224123 is 3214221212.

It is a balanced prime because it is at equal distance from previous prime (2121224117) and next prime (2121224129).

It is a cyclic number.

It is not a de Polignac number, because 2121224123 - 2¹⁸ = 2120961979 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121224095 and 2121224104.

It is not a weakly prime, because it can be changed into another prime (2121224129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060612061 + 1060612062.

It is an arithmetic number, because the mean of its divisors is an integer number (1060612062).

Almost surely, 2^2121224123 is an apocalyptic number.

2121224123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121224123 is an equidigital number, since it uses as much as digits as its factorization.

2121224123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 2121224123 is about 46056.7489408447. The cubic root of 2121224123 is about 1284.8788659804.

Adding to 2121224123 its reverse (3214221212), we get a palindrome (5335445335).

The spelling of 2121224123 in words is "two billion, one hundred twenty-one million, two hundred twenty-four thousand, one hundred twenty-three".