100001231857 has 2 divisors, whose sum is σ = 100001231858. Its totient is φ = 100001231856.

The previous prime is 100001231819. The next prime is 100001231861. The reversal of 100001231857 is 758132100001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83822409441 + 16178822416 = 289521^2 + 127196^2 .

It is an emirp because it is prime and its reverse (758132100001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100001231857 is a prime.

It is not a weakly prime, because it can be changed into another prime (100001231807) 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 as a sum of consecutive naturals, namely, 50000615928 + 50000615929.

It is an arithmetic number, because the mean of its divisors is an integer number (50000615929).

Almost surely, 2^100001231857 is an apocalyptic number.

It is an amenable number.

100001231857 is a deficient number, since it is larger than the sum of its proper divisors (1).

100001231857 is an equidigital number, since it uses as much as digits as its factorization.

100001231857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

Adding to 100001231857 its reverse (758132100001), we get a palindrome (858133331858).

The spelling of 100001231857 in words is "one hundred billion, one million, two hundred thirty-one thousand, eight hundred fifty-seven".