221323201044 has 36 divisors (see below), whose sum is σ = 567636092352. Its totient is φ = 67067636240.

The previous prime is 221323200949. The next prime is 221323201049. The reversal of 221323201044 is 440102323122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221323201049) 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, 76211772 + ... + 76214675.

It is an arithmetic number, because the mean of its divisors is an integer number (15767669232).

Almost surely, 2^221323201044 is an apocalyptic number.

It is an amenable number.

221323201044 is an abundant number, since it is smaller than the sum of its proper divisors (346312891308).

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

221323201044 is a wasteful number, since it uses less digits than its factorization.

221323201044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152426476 (or 152426463 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221323201044 its reverse (440102323122), we get a palindrome (661425524166).

The spelling of 221323201044 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred one thousand, forty-four".