120420515515531 has 16 divisors (see below), whose sum is σ = 150144509249280. Its totient is φ = 93828017587680.

The previous prime is 120420515515411. The next prime is 120420515515609. The reversal of 120420515515531 is 135515515024021.

It is a cyclic number.

It is not a de Polignac number, because 120420515515531 - 2³⁷ = 120283076562059 is a prime.

It is a super-2 number, since 2×120420515515531² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120420515555531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50070316 + ... + 52420201.

It is an arithmetic number, because the mean of its divisors is an integer number (9384031828080).

Almost surely, 2^{120420515515531} is an apocalyptic number.

120420515515531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120420515515531 is a deficient number, since it is larger than the sum of its proper divisors (29723993733749).

120420515515531 is a wasteful number, since it uses less digits than its factorization.

120420515515531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102505794.

The product of its (nonzero) digits is 150000, while the sum is 40.

The spelling of 120420515515531 in words is "one hundred twenty trillion, four hundred twenty billion, five hundred fifteen million, five hundred fifteen thousand, five hundred thirty-one".