221022020004 has 24 divisors (see below), whose sum is σ = 515894322048. Its totient is φ = 73648824480.

The previous prime is 221022019997. The next prime is 221022020017. The reversal of 221022020004 is 400020220122.

221022020004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3111187 + ... + 3181434.

It is an arithmetic number, because the mean of its divisors is an integer number (21495596752).

Almost surely, 2^221022020004 is an apocalyptic number.

It is an amenable number.

221022020004 is an abundant number, since it is smaller than the sum of its proper divisors (294872302044).

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

221022020004 is a wasteful number, since it uses less digits than its factorization.

221022020004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6295555 (or 6295553 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 221022020004 its reverse (400020220122), we get a palindrome (621042240126).

The spelling of 221022020004 in words is "two hundred twenty-one billion, twenty-two million, twenty thousand, four".