221000403411444 has 48 divisors (see below), whose sum is σ = 516589502603328. Its totient is φ = 73535127065088.

The previous prime is 221000403411421. The next prime is 221000403411457. The reversal of 221000403411444 is 444114304000122.

It is a happy number.

It is a congruent number.

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, 68930794 + ... + 72065630.

It is an arithmetic number, because the mean of its divisors is an integer number (10762281304236).

Almost surely, 2^{221000403411444} is an apocalyptic number.

It is an amenable number.

221000403411444 is an abundant number, since it is smaller than the sum of its proper divisors (295589099191884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221000403411444 is a wasteful number, since it uses less digits than its factorization.

221000403411444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145344 (or 3145342 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 221000403411444 its reverse (444114304000122), we get a palindrome (665114707411566).

The spelling of 221000403411444 in words is "two hundred twenty-one trillion, four hundred three million, four hundred eleven thousand, four hundred forty-four".