221233021004 has 12 divisors (see below), whose sum is σ = 389296781328. Its totient is φ = 110005369200.

The previous prime is 221233021003. The next prime is 221233021007. The reversal of 221233021004 is 400120332122.

It is not an unprimeable number, because it can be changed into a prime (221233021001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152784512 + ... + 152785959.

It is an arithmetic number, because the mean of its divisors is an integer number (32441398444).

Almost surely, 2^221233021004 is an apocalyptic number.

It is an amenable number.

221233021004 is a deficient number, since it is larger than the sum of its proper divisors (168063760324).

221233021004 is a wasteful number, since it uses less digits than its factorization.

221233021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305570656 (or 305570654 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221233021004 its reverse (400120332122), we get a palindrome (621353353126).

The spelling of 221233021004 in words is "two hundred twenty-one billion, two hundred thirty-three million, twenty-one thousand, four".