1221000330 has 32 divisors (see below), whose sum is σ = 3196801728. Its totient is φ = 296000000.

The previous prime is 1221000329. The next prime is 1221000343. The reversal of 1221000330 is 330001221.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1849671 + ... + 1850330.

It is an arithmetic number, because the mean of its divisors is an integer number (99900054).

Almost surely, 2^1221000330 is an apocalyptic number.

1221000330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221000330 is an abundant number, since it is smaller than the sum of its proper divisors (1975801398).

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

1221000330 is a wasteful number, since it uses less digits than its factorization.

1221000330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700022.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1221000330 is about 34942.8151413134. The cubic root of 1221000330 is about 1068.8216947219.

Adding to 1221000330 its reverse (330001221), we get a palindrome (1551001551).

The spelling of 1221000330 in words is "one billion, two hundred twenty-one million, three hundred thirty", and thus it is an aban number.