424042033221 has 24 divisors (see below), whose sum is σ = 648817752024. Its totient is φ = 265949537280.

The previous prime is 424042033199. The next prime is 424042033229. The reversal of 424042033221 is 122330240424.

424042033221 is a `hidden beast` number, since 4 + 2 + 404 + 2 + 0 + 33 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 165393502596 + 258648530625 = 406686^2 + 508575^2 .

It is not a de Polignac number, because 424042033221 - 2²³ = 424033644613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424042033229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251850 + ... + 954731.

It is an arithmetic number, because the mean of its divisors is an integer number (27034073001).

Almost surely, 2^424042033221 is an apocalyptic number.

It is an amenable number.

424042033221 is a deficient number, since it is larger than the sum of its proper divisors (224775718803).

424042033221 is a wasteful number, since it uses less digits than its factorization.

424042033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208901 (or 1208898 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 424042033221 its reverse (122330240424), we get a palindrome (546372273645).

The spelling of 424042033221 in words is "four hundred twenty-four billion, forty-two million, thirty-three thousand, two hundred twenty-one".