221331210313 has 4 divisors (see below), whose sum is σ = 221333563648. Its totient is φ = 221328856980.

The previous prime is 221331210283. The next prime is 221331210319. The reversal of 221331210313 is 313012133122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221331210313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221331210319) 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, 1029453 + ... + 1225738.

It is an arithmetic number, because the mean of its divisors is an integer number (55333390912).

Almost surely, 2^221331210313 is an apocalyptic number.

It is an amenable number.

221331210313 is a deficient number, since it is larger than the sum of its proper divisors (2353335).

221331210313 is an equidigital number, since it uses as much as digits as its factorization.

221331210313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353334.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 221331210313 its reverse (313012133122), we get a palindrome (534343343435).

The spelling of 221331210313 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred ten thousand, three hundred thirteen".