1103030021 has 4 divisors (see below), whose sum is σ = 1150987872. Its totient is φ = 1055072172.

The previous prime is 1103030017. The next prime is 1103030053. The reversal of 1103030021 is 1200303011.

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 a cyclic number.

It is not a de Polignac number, because 1103030021 - 2² = 1103030017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1103029984 and 1103030011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103030221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23978891 + ... + 23978936.

It is an arithmetic number, because the mean of its divisors is an integer number (287746968).

Almost surely, 2^1103030021 is an apocalyptic number.

It is an amenable number.

1103030021 is a deficient number, since it is larger than the sum of its proper divisors (47957851).

1103030021 is an equidigital number, since it uses as much as digits as its factorization.

1103030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47957850.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1103030021 is about 33211.8957754597. The cubic root of 1103030021 is about 1033.2270739042.

Adding to 1103030021 its reverse (1200303011), we get a palindrome (2303333032).

The spelling of 1103030021 in words is "one billion, one hundred three million, thirty thousand, twenty-one".