21220323010303 has 4 divisors (see below), whose sum is σ = 21221644094848. Its totient is φ = 21219001925760.

The previous prime is 21220323010273. The next prime is 21220323010307. The reversal of 21220323010303 is 30301032302212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220323010303 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 (21220323010307) 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, 660518178 + ... + 660550303.

It is an arithmetic number, because the mean of its divisors is an integer number (5305411023712).

Almost surely, 2^{21220323010303} is an apocalyptic number.

21220323010303 is a deficient number, since it is larger than the sum of its proper divisors (1321084545).

21220323010303 is a wasteful number, since it uses less digits than its factorization.

21220323010303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321084544.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21220323010303 its reverse (30301032302212), we get a palindrome (51521355312515).

The spelling of 21220323010303 in words is "twenty-one trillion, two hundred twenty billion, three hundred twenty-three million, ten thousand, three hundred three".