221604410212 has 12 divisors (see below), whose sum is σ = 387814942060. Its totient is φ = 110800141056.

The previous prime is 221604410207. The next prime is 221604410233. The reversal of 221604410212 is 212014406122.

It can be written as a sum of positive squares in 2 ways, for example, as 37378035556 + 184226374656 = 193334^2 + 429216^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260373 + ... + 714844.

Almost surely, 2^221604410212 is an apocalyptic number.

It is an amenable number.

221604410212 is a deficient number, since it is larger than the sum of its proper divisors (166210531848).

221604410212 is a wasteful number, since it uses less digits than its factorization.

221604410212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032030 (or 1032028 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 221604410212 its reverse (212014406122), we get a palindrome (433618816334).

The spelling of 221604410212 in words is "two hundred twenty-one billion, six hundred four million, four hundred ten thousand, two hundred twelve".