351052511221 has 4 divisors (see below), whose sum is σ = 369528959200. Its totient is φ = 332576063244.

The previous prime is 351052511219. The next prime is 351052511239. The reversal of 351052511221 is 122115250153.

It is a happy number.

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 351052511221 - 2¹ = 351052511219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 351052511221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (351052511021) 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, 9238223961 + ... + 9238223998.

It is an arithmetic number, because the mean of its divisors is an integer number (92382239800).

Almost surely, 2^351052511221 is an apocalyptic number.

It is an amenable number.

351052511221 is a deficient number, since it is larger than the sum of its proper divisors (18476447979).

351052511221 is a wasteful number, since it uses less digits than its factorization.

351052511221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18476447978.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 351052511221 its reverse (122115250153), we get a palindrome (473167761374).

The spelling of 351052511221 in words is "three hundred fifty-one billion, fifty-two million, five hundred eleven thousand, two hundred twenty-one".