42155121342 has 8 divisors (see below), whose sum is σ = 84310242696. Its totient is φ = 14051707112.

The previous prime is 42155121277. The next prime is 42155121377. The reversal of 42155121342 is 24312155124.

It is a sphenic number, since it is the product of 3 distinct primes.

42155121342 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3512926773 + ... + 3512926784.

It is an arithmetic number, because the mean of its divisors is an integer number (10538780337).

Almost surely, 2^42155121342 is an apocalyptic number.

42155121342 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42155121342 is a wasteful number, since it uses less digits than its factorization.

42155121342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025853562.

The product of its digits is 9600, while the sum is 30.

Adding to 42155121342 its reverse (24312155124), we get a palindrome (66467276466).

The spelling of 42155121342 in words is "forty-two billion, one hundred fifty-five million, one hundred twenty-one thousand, three hundred forty-two".