4021443234121 has 32 divisors (see below), whose sum is σ = 4445378150400. Its totient is φ = 3622823184960.

The previous prime is 4021443234119. The next prime is 4021443234139. The reversal of 4021443234121 is 1214323441204.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 4021443234121 - 2¹ = 4021443234119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021443234191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37776856 + ... + 37883158.

It is an arithmetic number, because the mean of its divisors is an integer number (138918067200).

Almost surely, 2^{4021443234121} is an apocalyptic number.

It is an amenable number.

4021443234121 is a deficient number, since it is larger than the sum of its proper divisors (423934916279).

4021443234121 is a wasteful number, since it uses less digits than its factorization.

4021443234121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107389.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 4021443234121 its reverse (1214323441204), we get a palindrome (5235766675325).

The spelling of 4021443234121 in words is "four trillion, twenty-one billion, four hundred forty-three million, two hundred thirty-four thousand, one hundred twenty-one".