4042021105155 has 32 divisors (see below), whose sum is σ = 7090617254400. Its totient is φ = 1949919713280.

The previous prime is 4042021105151. The next prime is 4042021105189. The reversal of 4042021105155 is 5515011202404.

It is not a de Polignac number, because 4042021105155 - 2² = 4042021105151 is a prime.

It is a super-2 number, since 2×4042021105155² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4042021105151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61517662 + ... + 61583331.

It is an arithmetic number, because the mean of its divisors is an integer number (221581789200).

Almost surely, 2^{4042021105155} is an apocalyptic number.

4042021105155 is a deficient number, since it is larger than the sum of its proper divisors (3048596149245).

4042021105155 is a wasteful number, since it uses less digits than its factorization.

4042021105155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123101211.

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 4042021105155 its reverse (5515011202404), we get a palindrome (9557032307559).

The spelling of 4042021105155 in words is "four trillion, forty-two billion, twenty-one million, one hundred five thousand, one hundred fifty-five".