21331011003 has 16 divisors (see below), whose sum is σ = 29714155776. Its totient is φ = 13585779680.

The previous prime is 21331010993. The next prime is 21331011011. The reversal of 21331011003 is 30011013312.

It is a cyclic number.

It is not a de Polignac number, because 21331011003 - 2⁸ = 21331010747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21331011043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131625 + ... + 244922.

It is an arithmetic number, because the mean of its divisors is an integer number (1857134736).

Almost surely, 2^21331011003 is an apocalyptic number.

21331011003 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21331011003 is a deficient number, since it is larger than the sum of its proper divisors (8383144773).

21331011003 is a wasteful number, since it uses less digits than its factorization.

21331011003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377394.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21331011003 its reverse (30011013312), we get a palindrome (51342024315).

The spelling of 21331011003 in words is "twenty-one billion, three hundred thirty-one million, eleven thousand, three".