121000006925857 has 2 divisors, whose sum is σ = 121000006925858. Its totient is φ = 121000006925856.

The previous prime is 121000006925851. The next prime is 121000006925873. The reversal of 121000006925857 is 758529600000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82901188890081 + 38098818035776 = 9105009^2 + 6172424^2 .

It is an emirp because it is prime and its reverse (758529600000121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121000006925857 - 2³ = 121000006925849 is a prime.

It is not a weakly prime, because it can be changed into another prime (121000006925851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500003462928 + 60500003462929.

It is an arithmetic number, because the mean of its divisors is an integer number (60500003462929).

Almost surely, 2^{121000006925857} is an apocalyptic number.

It is an amenable number.

121000006925857 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000006925857 is an equidigital number, since it uses as much as digits as its factorization.

121000006925857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 46.

Adding to 121000006925857 its reverse (758529600000121), we get a palindrome (879529606925978).

The spelling of 121000006925857 in words is "one hundred twenty-one trillion, six million, nine hundred twenty-five thousand, eight hundred fifty-seven".