120730542521 has 2 divisors, whose sum is σ = 120730542522. Its totient is φ = 120730542520.

The previous prime is 120730542503. The next prime is 120730542551. The reversal of 120730542521 is 125245037021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115592520121 + 5138022400 = 339989^2 + 71680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120730542521 is a prime.

It is not a weakly prime, because it can be changed into another prime (120730542551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60365271260 + 60365271261.

It is an arithmetic number, because the mean of its divisors is an integer number (60365271261).

Almost surely, 2^120730542521 is an apocalyptic number.

It is an amenable number.

120730542521 is a deficient number, since it is larger than the sum of its proper divisors (1).

120730542521 is an equidigital number, since it uses as much as digits as its factorization.

120730542521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 120730542521 its reverse (125245037021), we get a palindrome (245975579542).

The spelling of 120730542521 in words is "one hundred twenty billion, seven hundred thirty million, five hundred forty-two thousand, five hundred twenty-one".