221217874243200 has 1152 divisors, whose sum is σ = 866844643392000. Its totient is φ = 55551350845440.

The previous prime is 221217874243189. The next prime is 221217874243231. The reversal of 221217874243200 is 2342478712122.

221217874243200 is a `hidden beast` number, since 2 + 2 + 1 + 2 + 17 + 8 + 7 + 424 + 3 + 200 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 143 ways as a sum of consecutive naturals, for example, 2467279971 + ... + 2467369629.

It is an arithmetic number, because the mean of its divisors is an integer number (752469308500).

Almost surely, 2^{221217874243200} is an apocalyptic number.

221217874243200 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 221217874243200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (433422321696000).

221217874243200 is an abundant number, since it is smaller than the sum of its proper divisors (645626769148800).

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

221217874243200 is a wasteful number, since it uses less digits than its factorization.

221217874243200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89884 (or 89855 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 45.

The spelling of 221217874243200 in words is "two hundred twenty-one trillion, two hundred seventeen billion, eight hundred seventy-four million, two hundred forty-three thousand, two hundred".