320012211101221 has 4 divisors (see below), whose sum is σ = 320014603295244. Its totient is φ = 320009818907200.

The previous prime is 320012211101201. The next prime is 320012211101227. The reversal of 320012211101221 is 122101112210023.

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

It can be written as a sum of positive squares in 2 ways, for example, as 237700848002500 + 82311363098721 = 15417550^2 + 9072561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320012211101221 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 (320012211101227) 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, 1195896340 + ... + 1196163901.

It is an arithmetic number, because the mean of its divisors is an integer number (80003650823811).

Almost surely, 2^{320012211101221} is an apocalyptic number.

It is an amenable number.

320012211101221 is a deficient number, since it is larger than the sum of its proper divisors (2392194023).

320012211101221 is a wasteful number, since it uses less digits than its factorization.

320012211101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2392194022.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 320012211101221 its reverse (122101112210023), we get a palindrome (442113323311244).

The spelling of 320012211101221 in words is "three hundred twenty trillion, twelve billion, two hundred eleven million, one hundred one thousand, two hundred twenty-one".