21032213303 has 4 divisors (see below), whose sum is σ = 21320325888. Its totient is φ = 20744100720.

The previous prime is 21032213297. The next prime is 21032213309. The reversal of 21032213303 is 30331223012.

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

It is an interprime number because it is at equal distance from previous prime (21032213297) and next prime (21032213309).

It is a cyclic number.

It is not a de Polignac number, because 21032213303 - 2¹² = 21032209207 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 (21032213309) 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, 144056183 + ... + 144056328.

It is an arithmetic number, because the mean of its divisors is an integer number (5330081472).

Almost surely, 2^21032213303 is an apocalyptic number.

21032213303 is a deficient number, since it is larger than the sum of its proper divisors (288112585).

21032213303 is an equidigital number, since it uses as much as digits as its factorization.

21032213303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288112584.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21032213303 its reverse (30331223012), we get a palindrome (51363436315).

The spelling of 21032213303 in words is "twenty-one billion, thirty-two million, two hundred thirteen thousand, three hundred three".