121616587386397 has 2 divisors, whose sum is σ = 121616587386398. Its totient is φ = 121616587386396.

The previous prime is 121616587386323. The next prime is 121616587386409. The reversal of 121616587386397 is 793683785616121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117652072336516 + 3964515049881 = 10846754^2 + 1991109^2 .

It is a cyclic number.

It is not a de Polignac number, because 121616587386397 - 2⁷ = 121616587386269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121616587326397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60808293693198 + 60808293693199.

It is an arithmetic number, because the mean of its divisors is an integer number (60808293693199).

Almost surely, 2^{121616587386397} is an apocalyptic number.

It is an amenable number.

121616587386397 is a deficient number, since it is larger than the sum of its proper divisors (1).

121616587386397 is an equidigital number, since it uses as much as digits as its factorization.

121616587386397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 548674560, while the sum is 73.

The spelling of 121616587386397 in words is "one hundred twenty-one trillion, six hundred sixteen billion, five hundred eighty-seven million, three hundred eighty-six thousand, three hundred ninety-seven".