201124021309 has 2 divisors, whose sum is σ = 201124021310. Its totient is φ = 201124021308.

The previous prime is 201124021289. The next prime is 201124021313. The reversal of 201124021309 is 903120421102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197424705625 + 3699315684 = 444325^2 + 60822^2 .

It is a cyclic number.

It is not a de Polignac number, because 201124021309 - 2³⁵ = 166764282941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201124021369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100562010654 + 100562010655.

It is an arithmetic number, because the mean of its divisors is an integer number (100562010655).

Almost surely, 2^201124021309 is an apocalyptic number.

It is an amenable number.

201124021309 is a deficient number, since it is larger than the sum of its proper divisors (1).

201124021309 is an equidigital number, since it uses as much as digits as its factorization.

201124021309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 201124021309 in words is "two hundred one billion, one hundred twenty-four million, twenty-one thousand, three hundred nine".