221221432230000 has 200 divisors, whose sum is σ = 722156246341200. Its totient is φ = 58329545472000.

The previous prime is 221221432229983. The next prime is 221221432230079. The reversal of 221221432230000 is 32234122122.

It is a tau number, because it is divible by the number of its divisors (200).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 38757235 + ... + 44097234.

It is an arithmetic number, because the mean of its divisors is an integer number (3610781231706).

Almost surely, 2^{221221432230000} is an apocalyptic number.

221221432230000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221221432230000 is an abundant number, since it is smaller than the sum of its proper divisors (500934814111200).

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

221221432230000 is an equidigital number, since it uses as much as digits as its factorization.

221221432230000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82854589 (or 82854568 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221221432230000 its reverse (32234122122), we get a palindrome (221253666352122).

The spelling of 221221432230000 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, four hundred thirty-two million, two hundred thirty thousand".