42155121343 has 16 divisors (see below), whose sum is σ = 45145548000. Its totient is φ = 39243156480.

The previous prime is 42155121277. The next prime is 42155121377. The reversal of 42155121343 is 34312155124.

42155121343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 42155121343 - 2²⁵ = 42121566911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42155121443) 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, 1198455 + ... + 1233127.

It is an arithmetic number, because the mean of its divisors is an integer number (2821596750).

Almost surely, 2^42155121343 is an apocalyptic number.

42155121343 is a deficient number, since it is larger than the sum of its proper divisors (2990426657).

42155121343 is a wasteful number, since it uses less digits than its factorization.

42155121343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35802.

The product of its digits is 14400, while the sum is 31.

Adding to 42155121343 its reverse (34312155124), we get a palindrome (76467276467).

The spelling of 42155121343 in words is "forty-two billion, one hundred fifty-five million, one hundred twenty-one thousand, three hundred forty-three".