21201022210004 has 48 divisors (see below), whose sum is σ = 47649120169728. Its totient is φ = 8022555940608.

The previous prime is 21201022209937. The next prime is 21201022210007. The reversal of 21201022210004 is 40001222010212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201022210007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1266177857 + ... + 1266194600.

It is an arithmetic number, because the mean of its divisors is an integer number (992690003536).

Almost surely, 2^{21201022210004} is an apocalyptic number.

It is an amenable number.

21201022210004 is an abundant number, since it is smaller than the sum of its proper divisors (26448097959724).

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

21201022210004 is a wasteful number, since it uses less digits than its factorization.

21201022210004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532372504 (or 2532372502 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21201022210004 its reverse (40001222010212), we get a palindrome (61202244220216).

The spelling of 21201022210004 in words is "twenty-one trillion, two hundred one billion, twenty-two million, two hundred ten thousand, four".