1103000021 has 2 divisors, whose sum is σ = 1103000022. Its totient is φ = 1103000020.

The previous prime is 1103000011. The next prime is 1103000039. The reversal of 1103000021 is 1200003011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 912946225 + 190053796 = 30215^2 + 13786^2 .

It is a cyclic number.

It is not a de Polignac number, because 1103000021 - 2²² = 1098805717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1102999972 and 1103000008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1103000011) 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 as a sum of consecutive naturals, namely, 551500010 + 551500011.

It is an arithmetic number, because the mean of its divisors is an integer number (551500011).

Almost surely, 2^1103000021 is an apocalyptic number.

It is an amenable number.

1103000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103000021 is an equidigital number, since it uses as much as digits as its factorization.

1103000021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1103000021 is about 33211.4441269873. Note that the first 3 decimals coincide. The cubic root of 1103000021 is about 1033.2177066483.

Adding to 1103000021 its reverse (1200003011), we get a palindrome (2303003032).

The spelling of 1103000021 in words is "one billion, one hundred three million, twenty-one", and thus it is an aban number.