1020021103 has 8 divisors (see below), whose sum is σ = 1044817488. Its totient is φ = 995273664.

The previous prime is 1020020983. The next prime is 1020021127. The reversal of 1020021103 is 3011200201.

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 1020021103 - 2¹⁷ = 1019890031 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 1020021103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020021133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31851 + ... + 55267.

It is an arithmetic number, because the mean of its divisors is an integer number (130602186).

Almost surely, 2^1020021103 is an apocalyptic number.

1020021103 is a deficient number, since it is larger than the sum of its proper divisors (24796385).

1020021103 is a wasteful number, since it uses less digits than its factorization.

1020021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24473.

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

The square root of 1020021103 is about 31937.7692239142. The cubic root of 1020021103 is about 1006.6296515904.

Adding to 1020021103 its reverse (3011200201), we get a palindrome (4031221304).

The spelling of 1020021103 in words is "one billion, twenty million, twenty-one thousand, one hundred three".