201124139857 has 2 divisors, whose sum is σ = 201124139858. Its totient is φ = 201124139856.

The previous prime is 201124139851. The next prime is 201124139873. The reversal of 201124139857 is 758931421102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200676224961 + 447914896 = 447969^2 + 21164^2 .

It is a cyclic number.

It is not a de Polignac number, because 201124139857 - 2⁷ = 201124139729 is a prime.

It is not a weakly prime, because it can be changed into another prime (201124139851) 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, 100562069928 + 100562069929.

It is an arithmetic number, because the mean of its divisors is an integer number (100562069929).

Almost surely, 2^201124139857 is an apocalyptic number.

It is an amenable number.

201124139857 is a deficient number, since it is larger than the sum of its proper divisors (1).

201124139857 is an equidigital number, since it uses as much as digits as its factorization.

201124139857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 201124139857 in words is "two hundred one billion, one hundred twenty-four million, one hundred thirty-nine thousand, eight hundred fifty-seven".