1220221332000 has 1152 divisors, whose sum is σ = 4919776662528. Its totient is φ = 283825152000.

The previous prime is 1220221331999. The next prime is 1220221332019. The reversal of 1220221332000 is 2331220221.

1220221332000 is a `hidden beast` number, since 122 + 0 + 221 + 3 + 320 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 986435382 + ... + 986436618.

It is an arithmetic number, because the mean of its divisors is an integer number (4270639464).

Almost surely, 2^{1220221332000} is an apocalyptic number.

1220221332000 is a gapful number since it is divisible by the number (10) 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 1220221332000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2459888331264).

1220221332000 is an abundant number, since it is smaller than the sum of its proper divisors (3699555330528).

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

1220221332000 is a wasteful number, since it uses less digits than its factorization.

1220221332000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379 (or 1358 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1220221332000 its reverse (2331220221), we get a palindrome (1222552552221).

The spelling of 1220221332000 in words is "one trillion, two hundred twenty billion, two hundred twenty-one million, three hundred thirty-two thousand".