4042402311421 has 4 divisors (see below), whose sum is σ = 4042415322972. Its totient is φ = 4042389299872.

The previous prime is 4042402311331. The next prime is 4042402311473. The reversal of 4042402311421 is 1241132042404.

4042402311421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1502806292100 + 2539596019321 = 1225890^2 + 1593611^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042402311421 - 2⁹ = 4042402310909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4042402311421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042402311491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6028066 + ... + 6665011.

It is an arithmetic number, because the mean of its divisors is an integer number (1010603830743).

Almost surely, 2^{4042402311421} is an apocalyptic number.

It is an amenable number.

4042402311421 is a deficient number, since it is larger than the sum of its proper divisors (13011551).

4042402311421 is a wasteful number, since it uses less digits than its factorization.

4042402311421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13011550.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 4042402311421 its reverse (1241132042404), we get a palindrome (5283534353825).

The spelling of 4042402311421 in words is "four trillion, forty-two billion, four hundred two million, three hundred eleven thousand, four hundred twenty-one".