21152212054600 has 96 divisors (see below), whose sum is σ = 54202791736800. Its totient is φ = 7612417382400.

The previous prime is 21152212054579. The next prime is 21152212054607. The reversal of 21152212054600 is 645021225112.

It is not an unprimeable number, because it can be changed into a prime (21152212054607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49346610 + ... + 49773409.

It is an arithmetic number, because the mean of its divisors is an integer number (564612413925).

Almost surely, 2^{21152212054600} is an apocalyptic number.

21152212054600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21152212054600 is an abundant number, since it is smaller than the sum of its proper divisors (33050579682200).

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

21152212054600 is a wasteful number, since it uses less digits than its factorization.

21152212054600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99120143 (or 99120134 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 21152212054600 its reverse (645021225112), we get a palindrome (21797233279712).

The spelling of 21152212054600 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred twelve million, fifty-four thousand, six hundred".