1221133103 has 8 divisors (see below), whose sum is σ = 1297127520. Its totient is φ = 1145601280.

The previous prime is 1221133093. The next prime is 1221133117. The reversal of 1221133103 is 3013311221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221133103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221133153) 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, 110198 + ... + 120771.

It is an arithmetic number, because the mean of its divisors is an integer number (162140940).

Almost surely, 2^1221133103 is an apocalyptic number.

1221133103 is a deficient number, since it is larger than the sum of its proper divisors (75994417).

1221133103 is a wasteful number, since it uses less digits than its factorization.

1221133103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231297.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1221133103 is about 34944.7149509050. The cubic root of 1221133103 is about 1068.8604349569.

Adding to 1221133103 its reverse (3013311221), we get a palindrome (4234444324).

The spelling of 1221133103 in words is "one billion, two hundred twenty-one million, one hundred thirty-three thousand, one hundred three".