1021113103 has 4 divisors (see below), whose sum is σ = 1022001408. Its totient is φ = 1020224800.

The previous prime is 1021113101. The next prime is 1021113151. The reversal of 1021113103 is 3013111201.

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 1021113103 - 2¹ = 1021113101 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 (1021113101) 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, 442426 + ... + 444727.

It is an arithmetic number, because the mean of its divisors is an integer number (255500352).

Almost surely, 2^1021113103 is an apocalyptic number.

1021113103 is a deficient number, since it is larger than the sum of its proper divisors (888305).

1021113103 is an equidigital number, since it uses as much as digits as its factorization.

1021113103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888304.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1021113103 is about 31954.8603971289. The cubic root of 1021113103 is about 1006.9887446653.

Adding to 1021113103 its reverse (3013111201), we get a palindrome (4034224304).

The spelling of 1021113103 in words is "one billion, twenty-one million, one hundred thirteen thousand, one hundred three".