221323123303303 has 4 divisors (see below), whose sum is σ = 252940712346640. Its totient is φ = 189705534259968.

The previous prime is 221323123303291. The next prime is 221323123303349. The reversal of 221323123303303 is 303303321323122.

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-221323123303303 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 (221323123306303) 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, 15808794521658 + ... + 15808794521671.

It is an arithmetic number, because the mean of its divisors is an integer number (63235178086660).

Almost surely, 2^{221323123303303} is an apocalyptic number.

221323123303303 is a deficient number, since it is larger than the sum of its proper divisors (31617589043337).

221323123303303 is an equidigital number, since it uses as much as digits as its factorization.

221323123303303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31617589043336.

The product of its (nonzero) digits is 34992, while the sum is 31.

Adding to 221323123303303 its reverse (303303321323122), we get a palindrome (524626444626425).

The spelling of 221323123303303 in words is "two hundred twenty-one trillion, three hundred twenty-three billion, one hundred twenty-three million, three hundred three thousand, three hundred three".