124244021309 has 4 divisors (see below), whose sum is σ = 124245203004. Its totient is φ = 124242839616.

The previous prime is 124244021299. The next prime is 124244021329. The reversal of 124244021309 is 903120442421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 584188900 + 123659832409 = 24170^2 + 351653^2 .

It is a cyclic number.

It is not a de Polignac number, because 124244021309 - 2²⁴ = 124227244093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124244021329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415862 + ... + 649175.

It is an arithmetic number, because the mean of its divisors is an integer number (31061300751).

Almost surely, 2^124244021309 is an apocalyptic number.

It is an amenable number.

124244021309 is a deficient number, since it is larger than the sum of its proper divisors (1181695).

124244021309 is a wasteful number, since it uses less digits than its factorization.

124244021309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181694.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 124244021309 in words is "one hundred twenty-four billion, two hundred forty-four million, twenty-one thousand, three hundred nine".