4002131401421 has 4 divisors (see below), whose sum is σ = 4007216702592. Its totient is φ = 3997046100252.

The previous prime is 4002131401399. The next prime is 4002131401453. The reversal of 4002131401421 is 1241041312004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4002131401421 - 2¹⁴ = 4002131385037 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 (4002131409421) 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, 2542649405 + ... + 2542650978.

It is an arithmetic number, because the mean of its divisors is an integer number (1001804175648).

Almost surely, 2^{4002131401421} is an apocalyptic number.

It is an amenable number.

4002131401421 is a deficient number, since it is larger than the sum of its proper divisors (5085301171).

4002131401421 is an equidigital number, since it uses as much as digits as its factorization.

4002131401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5085301170.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 4002131401421 its reverse (1241041312004), we get a palindrome (5243172713425).

The spelling of 4002131401421 in words is "four trillion, two billion, one hundred thirty-one million, four hundred one thousand, four hundred twenty-one".