1221333010103 has 4 divisors (see below), whose sum is σ = 1221344718048. Its totient is φ = 1221321302160.

The previous prime is 1221333010039. The next prime is 1221333010187. The reversal of 1221333010103 is 3010103331221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1221333010103 - 2⁶ = 1221333010039 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 (1221333070103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5696078 + ... + 5906603.

It is an arithmetic number, because the mean of its divisors is an integer number (305336179512).

Almost surely, 2^{1221333010103} is an apocalyptic number.

1221333010103 is a deficient number, since it is larger than the sum of its proper divisors (11707945).

1221333010103 is a wasteful number, since it uses less digits than its factorization.

1221333010103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11707944.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1221333010103 its reverse (3010103331221), we get a palindrome (4231436341324).

The spelling of 1221333010103 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-three million, ten thousand, one hundred three".