121921547753 has 2 divisors, whose sum is σ = 121921547754. Its totient is φ = 121921547752.

The previous prime is 121921547747. The next prime is 121921547831. The reversal of 121921547753 is 357745129121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70414337449 + 51507210304 = 265357^2 + 226952^2 .

It is an emirp because it is prime and its reverse (357745129121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121921547753 - 2⁶ = 121921547689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121921547698 and 121921547707.

It is not a weakly prime, because it can be changed into another prime (121921547353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60960773876 + 60960773877.

It is an arithmetic number, because the mean of its divisors is an integer number (60960773877).

Almost surely, 2^121921547753 is an apocalyptic number.

It is an amenable number.

121921547753 is a deficient number, since it is larger than the sum of its proper divisors (1).

121921547753 is an equidigital number, since it uses as much as digits as its factorization.

121921547753 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 47.

The spelling of 121921547753 in words is "one hundred twenty-one billion, nine hundred twenty-one million, five hundred forty-seven thousand, seven hundred fifty-three".