351031311221201 has 4 divisors (see below), whose sum is σ = 378033719776692. Its totient is φ = 324028902665712.

The previous prime is 351031311221197. The next prime is 351031311221209. The reversal of 351031311221201 is 102122113130153.

It is a happy number.

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 140134811001025 + 210896500220176 = 11837855^2 + 14522276^2 .

It is a cyclic number.

It is not a de Polignac number, because 351031311221201 - 2² = 351031311221197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (351031311221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13501204277726 + ... + 13501204277751.

It is an arithmetic number, because the mean of its divisors is an integer number (94508429944173).

Almost surely, 2^{351031311221201} is an apocalyptic number.

It is an amenable number.

351031311221201 is a deficient number, since it is larger than the sum of its proper divisors (27002408555491).

351031311221201 is a wasteful number, since it uses less digits than its factorization.

351031311221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27002408555490.

The product of its (nonzero) digits is 1080, while the sum is 26.

Adding to 351031311221201 its reverse (102122113130153), we get a palindrome (453153424351354).

The spelling of 351031311221201 in words is "three hundred fifty-one trillion, thirty-one billion, three hundred eleven million, two hundred twenty-one thousand, two hundred one".