21507221084008 has 32 divisors (see below), whose sum is σ = 43996570341120. Its totient is φ = 9775003536000.

The previous prime is 21507221084003. The next prime is 21507221084029. The reversal of 21507221084008 is 80048012270512.

It is not an unprimeable number, because it can be changed into a prime (21507221084003) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11715288 + ... + 13426183.

It is an arithmetic number, because the mean of its divisors is an integer number (1374892823160).

Almost surely, 2^{21507221084008} is an apocalyptic number.

It is an amenable number.

21507221084008 is an abundant number, since it is smaller than the sum of its proper divisors (22489349257112).

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

21507221084008 is a wasteful number, since it uses less digits than its factorization.

21507221084008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25151209 (or 25151205 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The spelling of 21507221084008 in words is "twenty-one trillion, five hundred seven billion, two hundred twenty-one million, eighty-four thousand, eight".