331221230122213 has 4 divisors (see below), whose sum is σ = 331228548518080. Its totient is φ = 331213911726348.

The previous prime is 331221230122177. The next prime is 331221230122273. The reversal of 331221230122213 is 312221032122133.

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-331221230122213 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 (331221230122273) 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, 3659130045 + ... + 3659220562.

It is an arithmetic number, because the mean of its divisors is an integer number (82807137129520).

Almost surely, 2^{331221230122213} is an apocalyptic number.

It is an amenable number.

331221230122213 is a deficient number, since it is larger than the sum of its proper divisors (7318395867).

331221230122213 is an equidigital number, since it uses as much as digits as its factorization.

331221230122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7318395866.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 331221230122213 its reverse (312221032122133), we get a palindrome (643442262244346).

The spelling of 331221230122213 in words is "three hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirty million, one hundred twenty-two thousand, two hundred thirteen".