121698130577 has 2 divisors, whose sum is σ = 121698130578. Its totient is φ = 121698130576.

The previous prime is 121698130523. The next prime is 121698130601. The reversal of 121698130577 is 775031896121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117149437441 + 4548693136 = 342271^2 + 67444^2 .

It is a cyclic number.

It is not a de Polignac number, because 121698130577 - 2¹² = 121698126481 is a prime.

It is not a weakly prime, because it can be changed into another prime (121698130277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60849065288 + 60849065289.

It is an arithmetic number, because the mean of its divisors is an integer number (60849065289).

Almost surely, 2^121698130577 is an apocalyptic number.

It is an amenable number.

121698130577 is a deficient number, since it is larger than the sum of its proper divisors (1).

121698130577 is an equidigital number, since it uses as much as digits as its factorization.

121698130577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 50.

The spelling of 121698130577 in words is "one hundred twenty-one billion, six hundred ninety-eight million, one hundred thirty thousand, five hundred seventy-seven".