121706366497 has 2 divisors, whose sum is σ = 121706366498. Its totient is φ = 121706366496.

The previous prime is 121706366491. The next prime is 121706366521. The reversal of 121706366497 is 794663607121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82714335201 + 38992031296 = 287601^2 + 197464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121706366497 is a prime.

It is not a weakly prime, because it can be changed into another prime (121706366491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60853183248 + 60853183249.

It is an arithmetic number, because the mean of its divisors is an integer number (60853183249).

Almost surely, 2^121706366497 is an apocalyptic number.

It is an amenable number.

121706366497 is a deficient number, since it is larger than the sum of its proper divisors (1).

121706366497 is an equidigital number, since it uses as much as digits as its factorization.

121706366497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 121706366497 in words is "one hundred twenty-one billion, seven hundred six million, three hundred sixty-six thousand, four hundred ninety-seven".