1221030330 has 64 divisors (see below), whose sum is σ = 3159692928. Its totient is φ = 300199680.

The previous prime is 1221030329. The next prime is 1221030331. The reversal of 1221030330 is 330301221.

1221030330 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1221030329) and next prime (1221030331).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1221030331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 481165 + ... + 483695.

It is an arithmetic number, because the mean of its divisors is an integer number (49370202).

Almost surely, 2^1221030330 is an apocalyptic number.

1221030330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221030330 is an abundant number, since it is smaller than the sum of its proper divisors (1938662598).

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

1221030330 is a wasteful number, since it uses less digits than its factorization.

1221030330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1221030330 is about 34943.2444114739. The cubic root of 1221030330 is about 1068.8304483063.

Adding to 1221030330 its reverse (330301221), we get a palindrome (1551331551).

The spelling of 1221030330 in words is "one billion, two hundred twenty-one million, thirty thousand, three hundred thirty".