221131021344000 has 144 divisors (see below), whose sum is σ = 734486687712960. Its totient is φ = 58968272332800.

The previous prime is 221131021343957. The next prime is 221131021344019. The reversal of 221131021344000 is 443120131122.

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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1151628070 + ... + 1151820069.

Almost surely, 2^{221131021344000} is an apocalyptic number.

221131021344000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221131021344000 is an abundant number, since it is smaller than the sum of its proper divisors (513355666368960).

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

221131021344000 is an equidigital number, since it uses as much as digits as its factorization.

221131021344000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303448173 (or 2303448149 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 221131021344000 its reverse (443120131122), we get a palindrome (221574141475122).

The spelling of 221131021344000 in words is "two hundred twenty-one trillion, one hundred thirty-one billion, twenty-one million, three hundred forty-four thousand".