120021103 has 4 divisors (see below), whose sum is σ = 120643168. Its totient is φ = 119399040.

The previous prime is 120021101. The next prime is 120021137. The reversal of 120021103 is 301120021.

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 120021103 - 2¹ = 120021101 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 120021103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310743 + ... + 311128.

It is an arithmetic number, because the mean of its divisors is an integer number (30160792).

Almost surely, 2^120021103 is an apocalyptic number.

120021103 is a deficient number, since it is larger than the sum of its proper divisors (622065).

120021103 is an equidigital number, since it uses as much as digits as its factorization.

120021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622064.

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

The square root of 120021103 is about 10955.4143235206. The cubic root of 120021103 is about 493.2713267677.

Adding to 120021103 its reverse (301120021), we get a palindrome (421141124).

The spelling of 120021103 in words is "one hundred twenty million, twenty-one thousand, one hundred three".