120015016561 has 12 divisors (see below), whose sum is σ = 138860352400. Its totient is φ = 103362213240.

The previous prime is 120015016529. The next prime is 120015016567. The reversal of 120015016561 is 165610510021.

It is a happy number.

It is not a de Polignac number, because 120015016561 - 2⁵ = 120015016529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120015016567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26099271 + ... + 26103868.

Almost surely, 2^120015016561 is an apocalyptic number.

120015016561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120015016561 is a deficient number, since it is larger than the sum of its proper divisors (18845335839).

120015016561 is a wasteful number, since it uses less digits than its factorization.

120015016561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52203180 (or 52203169 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 120015016561 its reverse (165610510021), we get a palindrome (285625526582).

The spelling of 120015016561 in words is "one hundred twenty billion, fifteen million, sixteen thousand, five hundred sixty-one".