120554055521 has 2 divisors, whose sum is σ = 120554055522. Its totient is φ = 120554055520.

The previous prime is 120554055463. The next prime is 120554055553. The reversal of 120554055521 is 125550455021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106025128225 + 14528927296 = 325615^2 + 120536^2 .

It is an emirp because it is prime and its reverse (125550455021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120554055521 - 2¹⁰ = 120554054497 is a prime.

It is not a weakly prime, because it can be changed into another prime (120554055121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60277027760 + 60277027761.

It is an arithmetic number, because the mean of its divisors is an integer number (60277027761).

Almost surely, 2^120554055521 is an apocalyptic number.

It is an amenable number.

120554055521 is a deficient number, since it is larger than the sum of its proper divisors (1).

120554055521 is an equidigital number, since it uses as much as digits as its factorization.

120554055521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 120554055521 in words is "one hundred twenty billion, five hundred fifty-four million, fifty-five thousand, five hundred twenty-one".