1201221103 has 8 divisors (see below), whose sum is σ = 1208690480. Its totient is φ = 1193771520.

The previous prime is 1201221053. The next prime is 1201221107. The reversal of 1201221103 is 3011221021.

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

It is a cyclic number.

It is not a de Polignac number, because 1201221103 - 2⁹ = 1201220591 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 (1201221107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127588 + ... + 136678.

It is an arithmetic number, because the mean of its divisors is an integer number (151086310).

Almost surely, 2^1201221103 is an apocalyptic number.

1201221103 is a deficient number, since it is larger than the sum of its proper divisors (7469377).

1201221103 is an equidigital number, since it uses as much as digits as its factorization.

1201221103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9897.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1201221103 is about 34658.6367735374. The cubic root of 1201221103 is about 1063.0188957577.

Adding to 1201221103 its reverse (3011221021), we get a palindrome (4212442124).

The spelling of 1201221103 in words is "one billion, two hundred one million, two hundred twenty-one thousand, one hundred three".