121334546857 has 2 divisors, whose sum is σ = 121334546858. Its totient is φ = 121334546856.

The previous prime is 121334546843. The next prime is 121334546903. The reversal of 121334546857 is 758645433121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121256471961 + 78074896 = 348219^2 + 8836^2 .

It is a cyclic number.

It is not a de Polignac number, because 121334546857 - 2¹⁹ = 121334022569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121334546857.

It is not a weakly prime, because it can be changed into another prime (121334546807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60667273428 + 60667273429.

It is an arithmetic number, because the mean of its divisors is an integer number (60667273429).

Almost surely, 2^121334546857 is an apocalyptic number.

It is an amenable number.

121334546857 is a deficient number, since it is larger than the sum of its proper divisors (1).

121334546857 is an equidigital number, since it uses as much as digits as its factorization.

121334546857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 49.

Adding to 121334546857 its reverse (758645433121), we get a palindrome (879979979978).

The spelling of 121334546857 in words is "one hundred twenty-one billion, three hundred thirty-four million, five hundred forty-six thousand, eight hundred fifty-seven".