1221330103 has 8 divisors (see below), whose sum is σ = 1408159008. Its totient is φ = 1037589504.

The previous prime is 1221330091. The next prime is 1221330119. The reversal of 1221330103 is 3010331221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1221330103 - 2⁹ = 1221329591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221330163) 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 7 ways as a sum of consecutive naturals, for example, 771226 + ... + 772807.

It is an arithmetic number, because the mean of its divisors is an integer number (176019876).

Almost surely, 2^1221330103 is an apocalyptic number.

1221330103 is a deficient number, since it is larger than the sum of its proper divisors (186828905).

1221330103 is a wasteful number, since it uses less digits than its factorization.

1221330103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544153.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1221330103 is about 34947.5335753469. The cubic root of 1221330103 is about 1068.9179100411.

Adding to 1221330103 its reverse (3010331221), we get a palindrome (4231661324).

The spelling of 1221330103 in words is "one billion, two hundred twenty-one million, three hundred thirty thousand, one hundred three".