121698524513 has 2 divisors, whose sum is σ = 121698524514. Its totient is φ = 121698524512.

The previous prime is 121698524501. The next prime is 121698524527. The reversal of 121698524513 is 315425896121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68174776609 + 53523747904 = 261103^2 + 231352^2 .

It is a cyclic number.

It is not a de Polignac number, because 121698524513 - 2¹² = 121698520417 is a prime.

It is not a weakly prime, because it can be changed into another prime (121698524713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60849262256 + 60849262257.

It is an arithmetic number, because the mean of its divisors is an integer number (60849262257).

Almost surely, 2^121698524513 is an apocalyptic number.

It is an amenable number.

121698524513 is a deficient number, since it is larger than the sum of its proper divisors (1).

121698524513 is an equidigital number, since it uses as much as digits as its factorization.

121698524513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 47.

The spelling of 121698524513 in words is "one hundred twenty-one billion, six hundred ninety-eight million, five hundred twenty-four thousand, five hundred thirteen".