120520055145551 has 4 divisors (see below), whose sum is σ = 120968085090600. Its totient is φ = 120072025200504.

The previous prime is 120520055145481. The next prime is 120520055145593. The reversal of 120520055145551 is 155541550025021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120520055145551 - 2³⁸ = 120245177238607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120520055145499 and 120520055145508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120520055135551) 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 in 3 ways as a sum of consecutive naturals, for example, 224014972121 + ... + 224014972658.

It is an arithmetic number, because the mean of its divisors is an integer number (30242021272650).

Almost surely, 2^{120520055145551} is an apocalyptic number.

120520055145551 is a deficient number, since it is larger than the sum of its proper divisors (448029945049).

120520055145551 is an equidigital number, since it uses as much as digits as its factorization.

120520055145551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448029945048.

The product of its (nonzero) digits is 250000, while the sum is 41.

The spelling of 120520055145551 in words is "one hundred twenty trillion, five hundred twenty billion, fifty-five million, one hundred forty-five thousand, five hundred fifty-one".