21232203303 has 4 divisors (see below), whose sum is σ = 28309604408. Its totient is φ = 14154802200.

The previous prime is 21232203301. The next prime is 21232203313. The reversal of 21232203303 is 30330223212.

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

It is not a de Polignac number, because 21232203303 - 2¹ = 21232203301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21232203303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232203301) 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, 3538700548 + ... + 3538700553.

It is an arithmetic number, because the mean of its divisors is an integer number (7077401102).

Almost surely, 2^21232203303 is an apocalyptic number.

21232203303 is a deficient number, since it is larger than the sum of its proper divisors (7077401105).

21232203303 is an equidigital number, since it uses as much as digits as its factorization.

21232203303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7077401104.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21232203303 its reverse (30330223212), we get a palindrome (51562426515).

The spelling of 21232203303 in words is "twenty-one billion, two hundred thirty-two million, two hundred three thousand, three hundred three".