351115320351221 has 16 divisors (see below), whose sum is σ = 362826693841920. Its totient is φ = 339428045151360.

The previous prime is 351115320351163. The next prime is 351115320351239. The reversal of 351115320351221 is 122153023511153.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-351115320351221 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 (351115320351721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 706999631 + ... + 707496083.

It is an arithmetic number, because the mean of its divisors is an integer number (22676668365120).

Almost surely, 2^{351115320351221} is an apocalyptic number.

351115320351221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

351115320351221 is a deficient number, since it is larger than the sum of its proper divisors (11711373490699).

351115320351221 is a wasteful number, since it uses less digits than its factorization.

351115320351221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520676.

The product of its (nonzero) digits is 27000, while the sum is 35.

Adding to 351115320351221 its reverse (122153023511153), we get a palindrome (473268343862374).

The spelling of 351115320351221 in words is "three hundred fifty-one trillion, one hundred fifteen billion, three hundred twenty million, three hundred fifty-one thousand, two hundred twenty-one".