1103031021 has 4 divisors (see below), whose sum is σ = 1470708032. Its totient is φ = 735354012.

The previous prime is 1103031011. The next prime is 1103031029. The reversal of 1103031021 is 1201303011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1103031021 - 2¹⁰ = 1103029997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1103030988 and 1103031006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103031029) 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, 183838501 + ... + 183838506.

It is an arithmetic number, because the mean of its divisors is an integer number (367677008).

Almost surely, 2^1103031021 is an apocalyptic number.

It is an amenable number.

1103031021 is a deficient number, since it is larger than the sum of its proper divisors (367677011).

1103031021 is an equidigital number, since it uses as much as digits as its factorization.

1103031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367677010.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1103031021 is about 33211.9108303030. The cubic root of 1103031021 is about 1033.2273861431.

Adding to 1103031021 its reverse (1201303011), we get a palindrome (2304334032).

The spelling of 1103031021 in words is "one billion, one hundred three million, thirty-one thousand, twenty-one".