424002121020 has 96 divisors (see below), whose sum is σ = 1320795168000. Its totient is φ = 112923450432.

The previous prime is 424002121003. The next prime is 424002121043. The reversal of 424002121020 is 20121200424.

424002121020 is a `hidden beast` number, since 42 + 400 + 212 + 10 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 424002120984 and 424002121002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73870 + ... + 923829.

It is an arithmetic number, because the mean of its divisors is an integer number (13758283000).

Almost surely, 2^424002121020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424002121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660397584000).

424002121020 is an abundant number, since it is smaller than the sum of its proper divisors (896793046980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

424002121020 is a wasteful number, since it uses less digits than its factorization.

424002121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998504 (or 998496 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 424002121020 its reverse (20121200424), we get a palindrome (444123321444).

The spelling of 424002121020 in words is "four hundred twenty-four billion, two million, one hundred twenty-one thousand, twenty".