4042440423121 has 8 divisors (see below), whose sum is σ = 4283830895400. Its totient is φ = 3807849682560.

The previous prime is 4042440423107. The next prime is 4042440423137. The reversal of 4042440423121 is 1213240442404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 676275969600 + 3366164453521 = 822360^2 + 1834711^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4042440423121 - 2¹⁵ = 4042440390353 is a prime.

It is a super-2 number, since 2×4042440423121² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4042440423521) 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 7 ways as a sum of consecutive naturals, for example, 1699931706 + ... + 1699934083.

It is an arithmetic number, because the mean of its divisors is an integer number (535478861925).

Almost surely, 2^{4042440423121} is an apocalyptic number.

4042440423121 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4042440423121 is a deficient number, since it is larger than the sum of its proper divisors (241390472279).

4042440423121 is a wasteful number, since it uses less digits than its factorization.

4042440423121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399865859.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 4042440423121 its reverse (1213240442404), we get a palindrome (5255680865525).

The spelling of 4042440423121 in words is "four trillion, forty-two billion, four hundred forty million, four hundred twenty-three thousand, one hundred twenty-one".