350212032005221 has 4 divisors (see below), whose sum is σ = 370812739770252. Its totient is φ = 329611324240192.

The previous prime is 350212032005197. The next prime is 350212032005273. The reversal of 350212032005221 is 122500230212053.

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 130112553942721 + 220099478062500 = 11406689^2 + 14835750^2 .

It is a cyclic number.

It is not a de Polignac number, because 350212032005221 - 2²³ = 350212023616613 is a prime.

It is a super-2 number, since 2×350212032005221² (a number of 30 digits) contains 22 as substring.

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 350212032005221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (350212032005291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10300353882490 + ... + 10300353882523.

It is an arithmetic number, because the mean of its divisors is an integer number (92703184942563).

Almost surely, 2^{350212032005221} is an apocalyptic number.

It is an amenable number.

350212032005221 is a deficient number, since it is larger than the sum of its proper divisors (20600707765031).

350212032005221 is a wasteful number, since it uses less digits than its factorization.

350212032005221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20600707765030.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 350212032005221 its reverse (122500230212053), we get a palindrome (472712262217274).

The spelling of 350212032005221 in words is "three hundred fifty trillion, two hundred twelve billion, thirty-two million, five thousand, two hundred twenty-one".