21103034441 has 4 divisors (see below), whose sum is σ = 21357287952. Its totient is φ = 20848780932.

The previous prime is 21103034431. The next prime is 21103034453. The reversal of 21103034441 is 14443030112.

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 a de Polignac number, because none of the positive numbers 2^k-21103034441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103034411) 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, 127126631 + ... + 127126796.

It is an arithmetic number, because the mean of its divisors is an integer number (5339321988).

Almost surely, 2^21103034441 is an apocalyptic number.

It is an amenable number.

21103034441 is a deficient number, since it is larger than the sum of its proper divisors (254253511).

21103034441 is an equidigital number, since it uses as much as digits as its factorization.

21103034441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254253510.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21103034441 its reverse (14443030112), we get a palindrome (35546064553).

The spelling of 21103034441 in words is "twenty-one billion, one hundred three million, thirty-four thousand, four hundred forty-one".