4000024241221 has 4 divisors (see below), whose sum is σ = 4001095775692. Its totient is φ = 3998952706752.

The previous prime is 4000024241177. The next prime is 4000024241231. The reversal of 4000024241221 is 1221424200004.

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 890920780996 + 3109103460225 = 943886^2 + 1763265^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000024241221 - 2³⁵ = 3965664502853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4000024241192 and 4000024241201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000024241231) 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, 535761636 + ... + 535769101.

It is an arithmetic number, because the mean of its divisors is an integer number (1000273943923).

Almost surely, 2^{4000024241221} is an apocalyptic number.

It is an amenable number.

4000024241221 is a deficient number, since it is larger than the sum of its proper divisors (1071534471).

4000024241221 is a wasteful number, since it uses less digits than its factorization.

4000024241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071534470.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 4000024241221 its reverse (1221424200004), we get a palindrome (5221448441225).

The spelling of 4000024241221 in words is "four trillion, twenty-four million, two hundred forty-one thousand, two hundred twenty-one".