1221223230 has 96 divisors (see below), whose sum is σ = 3302208000. Its totient is φ = 324728352.

The previous prime is 1221223229. The next prime is 1221223301. The reversal of 1221223230 is 323221221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1455151 + ... + 1455989.

It is an arithmetic number, because the mean of its divisors is an integer number (34398000).

Almost surely, 2^1221223230 is an apocalyptic number.

1221223230 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 1221223230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1651104000).

1221223230 is an abundant number, since it is smaller than the sum of its proper divisors (2080984770).

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

1221223230 is an equidigital number, since it uses as much as digits as its factorization.

1221223230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460 (or 1448 counting only the distinct ones).

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

The square root of 1221223230 is about 34946.0044926455. The cubic root of 1221223230 is about 1068.8867304291.

Adding to 1221223230 its reverse (323221221), we get a palindrome (1544444451).

The spelling of 1221223230 in words is "one billion, two hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty".