21200321030 has 32 divisors (see below), whose sum is σ = 45907464960. Its totient is φ = 6886118880.

The previous prime is 21200320991. The next prime is 21200321063. The reversal of 21200321030 is 3012300212.

It is a happy number.

21200321030 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21200321030² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21200320996 and 21200321014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7968716 + ... + 7971375.

It is an arithmetic number, because the mean of its divisors is an integer number (1434608280).

Almost surely, 2^21200321030 is an apocalyptic number.

21200321030 is an abundant number, since it is smaller than the sum of its proper divisors (24707143930).

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

21200321030 is a wasteful number, since it uses less digits than its factorization.

21200321030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15940124.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21200321030 its reverse (3012300212), we get a palindrome (24212621242).

The spelling of 21200321030 in words is "twenty-one billion, two hundred million, three hundred twenty-one thousand, thirty".