42120322161 has 16 divisors (see below), whose sum is σ = 56439472320. Its totient is φ = 27940884480.

The previous prime is 42120322151. The next prime is 42120322207. The reversal of 42120322161 is 16122302124.

It is not a de Polignac number, because 42120322161 - 2¹⁰ = 42120321137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42120322151) 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 in 15 ways as a sum of consecutive naturals, for example, 887121 + ... + 933393.

It is an arithmetic number, because the mean of its divisors is an integer number (3527467020).

Almost surely, 2^42120322161 is an apocalyptic number.

It is an amenable number.

42120322161 is a deficient number, since it is larger than the sum of its proper divisors (14319150159).

42120322161 is a wasteful number, since it uses less digits than its factorization.

42120322161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47776.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 42120322161 its reverse (16122302124), we get a palindrome (58242624285).

The spelling of 42120322161 in words is "forty-two billion, one hundred twenty million, three hundred twenty-two thousand, one hundred sixty-one".