21232203003 has 72 divisors (see below), whose sum is σ = 36255188736. Its totient is φ = 12307561200.

The previous prime is 21232202903. The next prime is 21232203007. The reversal of 21232203003 is 30030223212.

It is a happy number.

It is not a de Polignac number, because 21232203003 - 2⁹ = 21232202491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21232203007) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1653538 + ... + 1666328.

It is an arithmetic number, because the mean of its divisors is an integer number (503544288).

Almost surely, 2^21232203003 is an apocalyptic number.

21232203003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21232203003 is a deficient number, since it is larger than the sum of its proper divisors (15022985733).

21232203003 is an equidigital number, since it uses as much as digits as its factorization.

21232203003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12849 (or 12828 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21232203003 its reverse (30030223212), we get a palindrome (51262426215).

The spelling of 21232203003 in words is "twenty-one billion, two hundred thirty-two million, two hundred three thousand, three".