221144203004 has 24 divisors (see below), whose sum is σ = 408693962880. Its totient is φ = 104490342704.

The previous prime is 221144202953. The next prime is 221144203019. The reversal of 221144203004 is 400302441122.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14472734 + ... + 14488005.

It is an arithmetic number, because the mean of its divisors is an integer number (17028915120).

Almost surely, 2^221144203004 is an apocalyptic number.

It is an amenable number.

221144203004 is a deficient number, since it is larger than the sum of its proper divisors (187549759876).

221144203004 is a wasteful number, since it uses less digits than its factorization.

221144203004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28960849 (or 28960847 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 221144203004 its reverse (400302441122), we get a palindrome (621446644126).

The spelling of 221144203004 in words is "two hundred twenty-one billion, one hundred forty-four million, two hundred three thousand, four".