1221333410 has 64 divisors (see below), whose sum is σ = 2438149248. Its totient is φ = 436800000.

The previous prime is 1221333389. The next prime is 1221333413. The reversal of 1221333410 is 143331221.

It is not an unprimeable number, because it can be changed into a prime (1221333413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2343950 + ... + 2344470.

It is an arithmetic number, because the mean of its divisors is an integer number (38096082).

Almost surely, 2^1221333410 is an apocalyptic number.

1221333410 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221333410 is a deficient number, since it is larger than the sum of its proper divisors (1216815838).

1221333410 is a wasteful number, since it uses less digits than its factorization.

1221333410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1221333410 is about 34947.5808890973. The cubic root of 1221333410 is about 1068.9188748112.

Adding to 1221333410 its reverse (143331221), we get a palindrome (1364664631).

The spelling of 1221333410 in words is "one billion, two hundred twenty-one million, three hundred thirty-three thousand, four hundred ten".