20130221303303 has 4 divisors (see below), whose sum is σ = 20460224931288. Its totient is φ = 19800217675320.

The previous prime is 20130221303293. The next prime is 20130221303323. The reversal of 20130221303303 is 30330312203102.

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-20130221303303 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 (20130221303323) 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, 165001813901 + ... + 165001814022.

It is an arithmetic number, because the mean of its divisors is an integer number (5115056232822).

Almost surely, 2^{20130221303303} is an apocalyptic number.

20130221303303 is a deficient number, since it is larger than the sum of its proper divisors (330003627985).

20130221303303 is an equidigital number, since it uses as much as digits as its factorization.

20130221303303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330003627984.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 20130221303303 its reverse (30330312203102), we get a palindrome (50460533506405).

The spelling of 20130221303303 in words is "twenty trillion, one hundred thirty billion, two hundred twenty-one million, three hundred three thousand, three hundred three".