221041244000 has 192 divisors, whose sum is σ = 548166528000. Its totient is φ = 87595776000.

The previous prime is 221041243999. The next prime is 221041244009. The reversal of 221041244000 is 442140122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221041244009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 266635586 + ... + 266636414.

It is an arithmetic number, because the mean of its divisors is an integer number (2855034000).

Almost surely, 2^221041244000 is an apocalyptic number.

221041244000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221041244000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274083264000).

221041244000 is an abundant number, since it is smaller than the sum of its proper divisors (327125284000).

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

221041244000 is a wasteful number, since it uses less digits than its factorization.

221041244000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1376 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 221041244000 its reverse (442140122), we get a palindrome (221483384122).

The spelling of 221041244000 in words is "two hundred twenty-one billion, forty-one million, two hundred forty-four thousand".