121765754653 has 2 divisors, whose sum is σ = 121765754654. Its totient is φ = 121765754652.

The previous prime is 121765754611. The next prime is 121765754717. The reversal of 121765754653 is 356457567121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115764618564 + 6001136089 = 340242^2 + 77467^2 .

It is an emirp because it is prime and its reverse (356457567121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121765754653 - 2²⁵ = 121732200221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121765754653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121765754053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60882877326 + 60882877327.

It is an arithmetic number, because the mean of its divisors is an integer number (60882877327).

Almost surely, 2^121765754653 is an apocalyptic number.

It is an amenable number.

121765754653 is a deficient number, since it is larger than the sum of its proper divisors (1).

121765754653 is an equidigital number, since it uses as much as digits as its factorization.

121765754653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292000, while the sum is 52.

The spelling of 121765754653 in words is "one hundred twenty-one billion, seven hundred sixty-five million, seven hundred fifty-four thousand, six hundred fifty-three".