21221546116330 has 32 divisors (see below), whose sum is σ = 44181724938624. Its totient is φ = 7188296513856.

The previous prime is 21221546116319. The next prime is 21221546116339. The reversal of 21221546116330 is 3361164512212.

It is a self number, because there is not a number n which added to its sum of digits gives 21221546116330.

It is not an unprimeable number, because it can be changed into a prime (21221546116339) 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 15 ways as a sum of consecutive naturals, for example, 1826289037 + ... + 1826300656.

It is an arithmetic number, because the mean of its divisors is an integer number (1380678904332).

Almost surely, 2^{21221546116330} is an apocalyptic number.

21221546116330 is an abundant number, since it is smaller than the sum of its proper divisors (22960178822294).

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

21221546116330 is a wasteful number, since it uses less digits than its factorization.

21221546116330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3652589790.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 21221546116330 in words is "twenty-one trillion, two hundred twenty-one billion, five hundred forty-six million, one hundred sixteen thousand, three hundred thirty".