221204444404 has 12 divisors (see below), whose sum is σ = 391771727424. Its totient is φ = 109269665144.

The previous prime is 221204444359. The next prime is 221204444407. The reversal of 221204444404 is 404444402122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221204444407) 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, 333138892 + ... + 333139555.

It is an arithmetic number, because the mean of its divisors is an integer number (32647643952).

Almost surely, 2^221204444404 is an apocalyptic number.

It is an amenable number.

221204444404 is a deficient number, since it is larger than the sum of its proper divisors (170567283020).

221204444404 is a wasteful number, since it uses less digits than its factorization.

221204444404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666278534 (or 666278532 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 221204444404 its reverse (404444402122), we get a palindrome (625648846526).

The spelling of 221204444404 in words is "two hundred twenty-one billion, two hundred four million, four hundred forty-four thousand, four hundred four".