1021020103 has 4 divisors (see below), whose sum is σ = 1022907928. Its totient is φ = 1019132280.

The previous prime is 1021020097. The next prime is 1021020107. The reversal of 1021020103 is 3010201201.

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 1021020103 - 2⁹ = 1021019591 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 1021020103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021020107) 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 3 ways as a sum of consecutive naturals, for example, 943101 + ... + 944182.

It is an arithmetic number, because the mean of its divisors is an integer number (255726982).

Almost surely, 2^1021020103 is an apocalyptic number.

1021020103 is a deficient number, since it is larger than the sum of its proper divisors (1887825).

1021020103 is an equidigital number, since it uses as much as digits as its factorization.

1021020103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887824.

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

The square root of 1021020103 is about 31953.4051863021. The cubic root of 1021020103 is about 1006.9581725389.

Adding to 1021020103 its reverse (3010201201), we get a palindrome (4031221304).

The spelling of 1021020103 in words is "one billion, twenty-one million, twenty thousand, one hundred three".