331221210349 has 2 divisors, whose sum is σ = 331221210350. Its totient is φ = 331221210348.

The previous prime is 331221210283. The next prime is 331221210367. The reversal of 331221210349 is 943012122133.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293067401449 + 38153808900 = 541357^2 + 195330^2 .

It is a cyclic number.

It is not a de Polignac number, because 331221210349 - 2¹¹ = 331221208301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331221210349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331221219349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165610605174 + 165610605175.

It is an arithmetic number, because the mean of its divisors is an integer number (165610605175).

Almost surely, 2^331221210349 is an apocalyptic number.

It is an amenable number.

331221210349 is a deficient number, since it is larger than the sum of its proper divisors (1).

331221210349 is an equidigital number, since it uses as much as digits as its factorization.

331221210349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 331221210349 in words is "three hundred thirty-one billion, two hundred twenty-one million, two hundred ten thousand, three hundred forty-nine".