1221303230 has 32 divisors (see below), whose sum is σ = 2516080320. Its totient is φ = 418118400.

The previous prime is 1221303227. The next prime is 1221303263. The reversal of 1221303230 is 323031221.

It is a junction number, because it is equal to n+sod(n) for n = 1221303199 and 1221303208.

It is a congruent 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, 36626 + ... + 61514.

It is an arithmetic number, because the mean of its divisors is an integer number (78627510).

Almost surely, 2^1221303230 is an apocalyptic number.

1221303230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221303230 is an abundant number, since it is smaller than the sum of its proper divisors (1294777090).

1221303230 is a wasteful number, since it uses less digits than its factorization.

1221303230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25604.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1221303230 is about 34947.1490968863. The cubic root of 1221303230 is about 1068.9100701618.

Adding to 1221303230 its reverse (323031221), we get a palindrome (1544334451).

The spelling of 1221303230 in words is "one billion, two hundred twenty-one million, three hundred three thousand, two hundred thirty".