1221003030 has 48 divisors (see below), whose sum is σ = 3173176080. Its totient is φ = 300553344.

The previous prime is 1221002963. The next prime is 1221003031. The reversal of 1221003030 is 303001221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221002997 and 1221003015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221003031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115345 + ... + 125484.

It is an arithmetic number, because the mean of its divisors is an integer number (66107835).

Almost surely, 2^1221003030 is an apocalyptic number.

1221003030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221003030 is an abundant number, since it is smaller than the sum of its proper divisors (1952173050).

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

1221003030 is a wasteful number, since it uses less digits than its factorization.

1221003030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240865 (or 240852 counting only the distinct ones).

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

The square root of 1221003030 is about 34942.8537758438. The cubic root of 1221003030 is about 1068.8224825504.

Adding to 1221003030 its reverse (303001221), we get a palindrome (1524004251).

The spelling of 1221003030 in words is "one billion, two hundred twenty-one million, three thousand, thirty".