30421040021520 has 40 divisors (see below), whose sum is σ = 94305224067456. Its totient is φ = 8112277339008.

The previous prime is 30421040021509. The next prime is 30421040021573. The reversal of 30421040021520 is 2512004012403.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×30421040021520² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63377166472 + ... + 63377166951.

Almost surely, 2^{30421040021520} is an apocalyptic number.

30421040021520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30421040021520 is an abundant number, since it is smaller than the sum of its proper divisors (63884184045936).

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

30421040021520 is a wasteful number, since it uses less digits than its factorization.

30421040021520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126754333439 (or 126754333433 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 30421040021520 its reverse (2512004012403), we get a palindrome (32933044033923).

The spelling of 30421040021520 in words is "thirty trillion, four hundred twenty-one billion, forty million, twenty-one thousand, five hundred twenty".