21220200023204 has 288 divisors, whose sum is σ = 47429161920000. Its totient is φ = 8232642302976.

The previous prime is 21220200023203. The next prime is 21220200023227. The reversal of 21220200023204 is 40232000202212.

It is a super-3 number, since 3×21220200023204³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220200023201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26625093734 + ... + 26625094530.

It is an arithmetic number, because the mean of its divisors is an integer number (164684590000).

Almost surely, 2^{21220200023204} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21220200023204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23714580960000).

21220200023204 is an abundant number, since it is smaller than the sum of its proper divisors (26208961896796).

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

21220200023204 is a wasteful number, since it uses less digits than its factorization.

21220200023204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 21220200023204 its reverse (40232000202212), we get a palindrome (61452200225416).

The spelling of 21220200023204 in words is "twenty-one trillion, two hundred twenty billion, two hundred million, twenty-three thousand, two hundred four".