121685941373 has 2 divisors, whose sum is σ = 121685941374. Its totient is φ = 121685941372.

The previous prime is 121685941361. The next prime is 121685941387. The reversal of 121685941373 is 373149586121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111744455524 + 9941485849 = 334282^2 + 99707^2 .

It is a cyclic number.

It is not a de Polignac number, because 121685941373 - 2¹² = 121685937277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121685941343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60842970686 + 60842970687.

It is an arithmetic number, because the mean of its divisors is an integer number (60842970687).

Almost surely, 2^121685941373 is an apocalyptic number.

It is an amenable number.

121685941373 is a deficient number, since it is larger than the sum of its proper divisors (1).

121685941373 is an equidigital number, since it uses as much as digits as its factorization.

121685941373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The spelling of 121685941373 in words is "one hundred twenty-one billion, six hundred eighty-five million, nine hundred forty-one thousand, three hundred seventy-three".