21241034430400 has 84 divisors (see below), whose sum is σ = 52268193668128. Its totient is φ = 8496092989440.

The previous prime is 21241034430391. The next prime is 21241034430409. The reversal of 21241034430400 is 403443014212.

It is an interprime number because it is at equal distance from previous prime (21241034430391) and next prime (21241034430409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241034430409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44654617 + ... + 45127783.

Almost surely, 2^{21241034430400} is an apocalyptic number.

21241034430400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21241034430400 is an abundant number, since it is smaller than the sum of its proper divisors (31027159237728).

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

21241034430400 is a wasteful number, since it uses less digits than its factorization.

21241034430400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501246 (or 501231 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21241034430400 its reverse (403443014212), we get a palindrome (21644477444612).

The spelling of 21241034430400 in words is "twenty-one trillion, two hundred forty-one billion, thirty-four million, four hundred thirty thousand, four hundred".