21233031103 has 4 divisors (see below), whose sum is σ = 21726822568. Its totient is φ = 20739239640.

The previous prime is 21233031077. The next prime is 21233031109. The reversal of 21233031103 is 30113033212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21233031103 - 2⁹ = 21233030591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233031109) 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, 246895668 + ... + 246895753.

It is an arithmetic number, because the mean of its divisors is an integer number (5431705642).

Almost surely, 2^21233031103 is an apocalyptic number.

21233031103 is a deficient number, since it is larger than the sum of its proper divisors (493791465).

21233031103 is an equidigital number, since it uses as much as digits as its factorization.

21233031103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493791464.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21233031103 its reverse (30113033212), we get a palindrome (51346064315).

The spelling of 21233031103 in words is "twenty-one billion, two hundred thirty-three million, thirty-one thousand, one hundred three".