221212301323 has 16 divisors (see below), whose sum is σ = 243574079616. Its totient is φ = 199624043520.

The previous prime is 221212301273. The next prime is 221212301369. The reversal of 221212301323 is 323103212122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221212301323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221212301294 and 221212301303.

It is not an unprimeable number, because it can be changed into a prime (221212301383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332815 + ... + 743767.

It is an arithmetic number, because the mean of its divisors is an integer number (15223379976).

Almost surely, 2^221212301323 is an apocalyptic number.

221212301323 is a deficient number, since it is larger than the sum of its proper divisors (22361778293).

221212301323 is a wasteful number, since it uses less digits than its factorization.

221212301323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411894.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 221212301323 its reverse (323103212122), we get a palindrome (544315513445).

The spelling of 221212301323 in words is "two hundred twenty-one billion, two hundred twelve million, three hundred one thousand, three hundred twenty-three".