1221210230 has 32 divisors (see below), whose sum is σ = 2224744704. Its totient is φ = 482603616.

The previous prime is 1221210227. The next prime is 1221210239. The reversal of 1221210230 is 320121221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221210239) 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 15 ways as a sum of consecutive naturals, for example, 537557 + ... + 539823.

It is an arithmetic number, because the mean of its divisors is an integer number (69523272).

Almost surely, 2^1221210230 is an apocalyptic number.

1221210230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221210230 is a deficient number, since it is larger than the sum of its proper divisors (1003534474).

1221210230 is a wasteful number, since it uses less digits than its factorization.

1221210230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2900.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1221210230 is about 34945.8184909153. The cubic root of 1221210230 is about 1068.8829376263.

Adding to 1221210230 its reverse (320121221), we get a palindrome (1541331451).

The spelling of 1221210230 in words is "one billion, two hundred twenty-one million, two hundred ten thousand, two hundred thirty".