121112200857877 has 2 divisors, whose sum is σ = 121112200857878. Its totient is φ = 121112200857876.

The previous prime is 121112200857757. The next prime is 121112200857881. The reversal of 121112200857877 is 778758002211121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101075395747876 + 20036805110001 = 10053626^2 + 4476249^2 .

It is a cyclic number.

It is not a de Polignac number, because 121112200857877 - 2¹¹ = 121112200855829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121112200858877) 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, 60556100428938 + 60556100428939.

It is an arithmetic number, because the mean of its divisors is an integer number (60556100428939).

Almost surely, 2^{121112200857877} is an apocalyptic number.

It is an amenable number.

121112200857877 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112200857877 is an equidigital number, since it uses as much as digits as its factorization.

121112200857877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 878080, while the sum is 52.

The spelling of 121112200857877 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred million, eight hundred fifty-seven thousand, eight hundred seventy-seven".