221004022144 has 32 divisors (see below), whose sum is σ = 459424128240. Its totient is φ = 105697574400.

The previous prime is 221004022079. The next prime is 221004022147. The reversal of 221004022144 is 441220400122.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221004022147) 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, 37531707 + ... + 37537594.

Almost surely, 2^221004022144 is an apocalyptic number.

It is an amenable number.

221004022144 is an abundant number, since it is smaller than the sum of its proper divisors (238420106096).

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

221004022144 is an equidigital number, since it uses as much as digits as its factorization.

221004022144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75069338 (or 75069326 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 221004022144 its reverse (441220400122), we get a palindrome (662224422266).

The spelling of 221004022144 in words is "two hundred twenty-one billion, four million, twenty-two thousand, one hundred forty-four".