1244213123 has 2 divisors, whose sum is σ = 1244213124. Its totient is φ = 1244213122.

The previous prime is 1244213111. The next prime is 1244213189. The reversal of 1244213123 is 3213124421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1244213123 - 2²⁴ = 1227435907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1244218123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622106561 + 622106562.

It is an arithmetic number, because the mean of its divisors is an integer number (622106562).

Almost surely, 2^1244213123 is an apocalyptic number.

1244213123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244213123 is an equidigital number, since it uses as much as digits as its factorization.

1244213123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 1244213123 is about 35273.4053218569. The cubic root of 1244213123 is about 1075.5524466760.

Adding to 1244213123 its reverse (3213124421), we get a palindrome (4457337544).

The spelling of 1244213123 in words is "one billion, two hundred forty-four million, two hundred thirteen thousand, one hundred twenty-three".