221000304122 has 32 divisors (see below), whose sum is σ = 360117651600. Its totient is φ = 101111643648.

The previous prime is 221000304071. The next prime is 221000304167. The reversal of 221000304122 is 221403000122.

It can be written as a sum of positive squares in 8 ways, for example, as 101926309081 + 119073995041 = 319259^2 + 345071^2 .

It is a super-2 number, since 2×221000304122² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221000304122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2481704 + ... + 2569212.

Almost surely, 2^221000304122 is an apocalyptic number.

221000304122 is a deficient number, since it is larger than the sum of its proper divisors (139117347478).

221000304122 is a wasteful number, since it uses less digits than its factorization.

221000304122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88370.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 221000304122 its reverse (221403000122), we get a palindrome (442403304244).

The spelling of 221000304122 in words is "two hundred twenty-one billion, three hundred four thousand, one hundred twenty-two".