221234342004 has 72 divisors (see below), whose sum is σ = 613612300392. Its totient is φ = 66787718400.

The previous prime is 221234341961. The next prime is 221234342009. The reversal of 221234342004 is 400243432122.

221234342004 is a `hidden beast` number, since 2 + 2 + 1 + 23 + 434 + 200 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3147210000 + 218087132004 = 56100^2 + 466998^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221234342009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4434847 + ... + 4484454.

It is an arithmetic number, because the mean of its divisors is an integer number (8522393061).

Almost surely, 2^221234342004 is an apocalyptic number.

It is an amenable number.

221234342004 is an abundant number, since it is smaller than the sum of its proper divisors (392377958388).

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

221234342004 is a wasteful number, since it uses less digits than its factorization.

221234342004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8919377 (or 8919372 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 221234342004 its reverse (400243432122), we get a palindrome (621477774126).

The spelling of 221234342004 in words is "two hundred twenty-one billion, two hundred thirty-four million, three hundred forty-two thousand, four".