226604220021 has 12 divisors (see below), whose sum is σ = 327327742560. Its totient is φ = 151064617320.

The previous prime is 226604219987. The next prime is 226604220053. The reversal of 226604220021 is 120022406622.

It is a happy number.

It is not a de Polignac number, because 226604220021 - 2³³ = 218014285429 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226604228021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97815 + ... + 680276.

It is an arithmetic number, because the mean of its divisors is an integer number (27277311880).

Almost surely, 2^226604220021 is an apocalyptic number.

It is an amenable number.

226604220021 is a deficient number, since it is larger than the sum of its proper divisors (100723522539).

226604220021 is a wasteful number, since it uses less digits than its factorization.

226604220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810456 (or 810453 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 226604220021 its reverse (120022406622), we get a palindrome (346626626643).

The spelling of 226604220021 in words is "two hundred twenty-six billion, six hundred four million, two hundred twenty thousand, twenty-one".