1200021103 has 8 divisors (see below), whose sum is σ = 1207664640. Its totient is φ = 1192392120.

The previous prime is 1200021101. The next prime is 1200021107. The reversal of 1200021103 is 3011200021.

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 1200021103 - 2¹ = 1200021101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200021103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200021101) 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, 195426 + ... + 201472.

It is an arithmetic number, because the mean of its divisors is an integer number (150958080).

Almost surely, 2^1200021103 is an apocalyptic number.

1200021103 is a deficient number, since it is larger than the sum of its proper divisors (7643537).

1200021103 is a wasteful number, since it uses less digits than its factorization.

1200021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7277.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1200021103 is about 34641.3207456067. The cubic root of 1200021103 is about 1062.6647983916.

Adding to 1200021103 its reverse (3011200021), we get a palindrome (4211221124).

The spelling of 1200021103 in words is "one billion, two hundred million, twenty-one thousand, one hundred three".