1221303000330 has 192 divisors, whose sum is σ = 3685921873920. Its totient is φ = 274783715712.

The previous prime is 1221303000329. The next prime is 1221303000391. The reversal of 1221303000330 is 330003031221.

1221303000330 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 30 + 300 + 0 + 330 = 666.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 60730137 + ... + 60750243.

It is an arithmetic number, because the mean of its divisors is an integer number (19197509760).

Almost surely, 2^{1221303000330} is an apocalyptic number.

1221303000330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221303000330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1842960936960).

1221303000330 is an abundant number, since it is smaller than the sum of its proper divisors (2464618873590).

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

1221303000330 is a wasteful number, since it uses less digits than its factorization.

1221303000330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21633 (or 21630 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 1221303000330 its reverse (330003031221), we get a palindrome (1551306031551).

The spelling of 1221303000330 in words is "one trillion, two hundred twenty-one billion, three hundred three million, three hundred thirty", and thus it is an aban number.