2151224123 has 2 divisors, whose sum is σ = 2151224124. Its totient is φ = 2151224122.

The previous prime is 2151224077. The next prime is 2151224143. The reversal of 2151224123 is 3214221512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151224123 is a prime.

It is not a weakly prime, because it can be changed into another prime (2151224143) 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 as a sum of consecutive naturals, namely, 1075612061 + 1075612062.

It is an arithmetic number, because the mean of its divisors is an integer number (1075612062).

Almost surely, 2^2151224123 is an apocalyptic number.

2151224123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151224123 is an equidigital number, since it uses as much as digits as its factorization.

2151224123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 23.

The square root of 2151224123 is about 46381.2906569017. The cubic root of 2151224123 is about 1290.9077846063.

Adding to 2151224123 its reverse (3214221512), we get a palindrome (5365445635).

The spelling of 2151224123 in words is "two billion, one hundred fifty-one million, two hundred twenty-four thousand, one hundred twenty-three".