351135111113221 has 4 divisors (see below), whose sum is σ = 351777040018912. Its totient is φ = 350493182207532.

The previous prime is 351135111113027. The next prime is 351135111113263. The reversal of 351135111113221 is 122311111531153.

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 not a de Polignac number, because 351135111113221 - 2¹³ = 351135111105029 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 (351135111113291) 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, 320964452025 + ... + 320964453118.

It is an arithmetic number, because the mean of its divisors is an integer number (87944260004728).

Almost surely, 2^{351135111113221} is an apocalyptic number.

It is an amenable number.

351135111113221 is a deficient number, since it is larger than the sum of its proper divisors (641928905691).

351135111113221 is an equidigital number, since it uses as much as digits as its factorization.

351135111113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641928905690.

The product of its digits is 2700, while the sum is 31.

Adding to 351135111113221 its reverse (122311111531153), we get a palindrome (473446222644374).

The spelling of 351135111113221 in words is "three hundred fifty-one trillion, one hundred thirty-five billion, one hundred eleven million, one hundred thirteen thousand, two hundred twenty-one".