21021421434000 has 320 divisors, whose sum is σ = 77279696282880. Its totient is φ = 4870120857600.

The previous prime is 21021421433941. The next prime is 21021421434049. The reversal of 21021421434000 is 43412412012.

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 (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6600630 + ... + 9252629.

It is an arithmetic number, because the mean of its divisors is an integer number (241499050884).

Almost surely, 2^{21021421434000} is an apocalyptic number.

21021421434000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021421434000 is an abundant number, since it is smaller than the sum of its proper divisors (56258274848880).

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

21021421434000 is a wasteful number, since it uses less digits than its factorization.

21021421434000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15853315 (or 15853299 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21021421434000 its reverse (43412412012), we get a palindrome (21064833846012).

The spelling of 21021421434000 in words is "twenty-one trillion, twenty-one billion, four hundred twenty-one million, four hundred thirty-four thousand".