1103432021 has 4 divisors (see below), whose sum is σ = 1109209344. Its totient is φ = 1097654700.

The previous prime is 1103431981. The next prime is 1103432041. The reversal of 1103432021 is 1202343011.

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 1103432021 - 2⁶ = 1103431957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103432041) 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, 2888375 + ... + 2888756.

It is an arithmetic number, because the mean of its divisors is an integer number (277302336).

Almost surely, 2^1103432021 is an apocalyptic number.

It is an amenable number.

1103432021 is a deficient number, since it is larger than the sum of its proper divisors (5777323).

1103432021 is an equidigital number, since it uses as much as digits as its factorization.

1103432021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5777322.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1103432021 is about 33217.9472725212. The cubic root of 1103432021 is about 1033.3525787490.

Adding to 1103432021 its reverse (1202343011), we get a palindrome (2305775032).

The spelling of 1103432021 in words is "one billion, one hundred three million, four hundred thirty-two thousand, twenty-one".